Malicious PDF — malware analysis report

Static analysis result for SHA-256 a91df0a42221177c…

MALICIOUS

PDF

52.1 KB Created: 2020-08-09 00:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ae940fe2398c845816013b8dbdc81c8b SHA-1: 2b404446417313b72d9a046d2f288f3cdafa9571 SHA-256: a91df0a42221177caa698d646677a20c479b32b5a962a5b40d95cacb20dc6e32
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF was flagged by a critical heuristic for containing a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=ipa+chart+english+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to benign Shopify domains but also include several unknown domains. The ML classifier also strongly indicated maliciousness. The presence of a malicious redirector suggests an attempt to lead users to a compromised or malicious site.

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.cc/pify?keyword=ipa+chart+english+pdf In PDF document text
    • http://files.drydenmontgomerypark.org/uploads/1/3/0/8/130814466/xuzivapekewigir-vemebafesoxizeb-dazoredosubebit-mipebawiwunilef.pdfIn PDF document text
    • http://kenozim.kbshoppingcenter.com/uploads/1/3/0/7/130775085/3673829.pdfIn PDF document text
    • http://xebaluwa.riccio-builders.com/uploads/1/3/1/6/131637814/121282c.pdfIn PDF document text
    • http://files.joel-nichols.com/uploads/1/3/2/7/132712120/1372492.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/1/0433/4796/8149/files/vafusenuzejoxuxojipono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31082235151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/57630919309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9243/4326/files/92211881830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8439/8244/files/14026602174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9726/7112/files/33239865103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8581/4177/files/waguwuvogufujewizagetaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0008/6175/files/8023611289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/8885619696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7818/0257/files/mexaletubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/nudulijekojare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7754/9728/files/vevarabigotolezula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/91244642254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/accounting_theory_belkaoui.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/widiwowinasotimiso.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA1 5356 bytes
SHA-256: d1f71a93f089738629a31dcb4d257aff6e595f521e888c62816cb37fb144a71c
font_01_sfnt_off00008cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 17680 bytes
SHA-256: 0da2b8324c333007e060737ac35400ac2f54f75006ffcd2ef73baab50e2e65aa