Malicious PDF — malware analysis report

Static analysis result for SHA-256 da878ad8cc568471…

MALICIOUS

PDF

39.2 KB Created: 2020-08-04 07:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ee060374720d46bad5d76c8f1bf09145 SHA-1: 5fe3c96d90d9c37b79b601423bbdf08e30248a07 SHA-256: da878ad8cc568471820376d8e618261a91c7bf9353aeb758428cfbd9b000263d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a mass of external links, many pointing to shopify.com domains, designed to appear as search results for "Bangla history book pdf download". One of these links, https://ttraff.com/pify?keyword=bangla+history+book+pdf+download, is identified as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=bangla+history+book+pdf+download In PDF document text
    • http://files.karamagreenhouses.org/uploads/1/3/1/3/131398250/6480046.pdfIn PDF document text
    • http://files.service-netflix.com/uploads/1/3/1/4/131453068/51436c517b40762.pdfIn PDF document text
    • http://files.hillscac.org/uploads/1/3/1/6/131607075/wiziwinazoralazutul.pdfIn PDF document text
    • http://nadizabot.be-you-tiful.me/uploads/1/3/1/4/131437402/mosawoxuporox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/18770183727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/mefuvidilefupumojesigod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/wuvitixap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/begenufafezeweb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/vobapuwelitixugogilewexip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/5944413541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1669/8526/files/80501137673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/17523932934.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/36558249060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/4025916397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/69572737498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2470/files/64019776592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3942/2624/files/find_angle_between_two_points.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000480f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x480F 5748 bytes
SHA-256: 7afdd01a8fe3cbae652747df6d21a0398f65a100aea0e27a4af35ac2af3df03d
font_01_sfnt_off00005bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB3 5264 bytes
SHA-256: 682e85dab9490a247e8346de49d217df7862e35e467e55a3cb1748a0a3e8a3e0
font_02_sfnt_off00006ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE0 10164 bytes
SHA-256: bfbf39caf180b83d2f4d083d417028ac7b64254607d506ea1e5a021a92890a7d