Malicious PDF — malware analysis report

Static analysis result for SHA-256 983ab4ea4a2ca29a…

MALICIOUS

PDF

62.1 KB Created: 2020-08-23 16:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40934e7c75c8a1a828ef3dece7b1f37e SHA-1: 6abba9c6361967aea466c15de8447af41fed2998 SHA-256: 983ab4ea4a2ca29a0f07f36c7c4ea6f1b99b7e7eca5252b18626513965519c35
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=samsung+s7+software+update+android+9'. This indicates a phishing attempt, likely to trick users into downloading malware or visiting a malicious site. The document body, though heavily corrupted, contains fragments of the same lure. The presence of a large number of embedded links, many hosted on Shopify, suggests a link farm designed to obscure the final malicious destination.

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=samsung+s7+software+update+android+9 In PDF document text
    • http://files.ncbcda.com/uploads/1/3/0/8/130814907/4053286.pdfIn PDF document text
    • http://dekoloxi.cyclebavaria.com/uploads/1/3/1/3/131379552/5590668.pdfIn PDF document text
    • http://mabod.cityreachswissvale.org/uploads/1/3/1/4/131437502/8650411.pdfIn PDF document text
    • http://files.norcalstma.org/uploads/1/3/0/7/130775828/3594297.pdfIn PDF document text
    • http://files.emeraldleaf.ca/uploads/1/3/2/3/132302966/zibujutew_mosozu.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/1/0435/6017/3717/files/32212777189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/vatax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/mikat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1755/8426/files/18842714607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/96352143133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/54100544367.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8007/0821/files/fizonesafuweduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7925/1608/files/cholera_epidemiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/vehicle_registration_sticker_form_vtr-_60.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/heroes_of_hammerwatch_puzzle_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/bavuxoxipitategujid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/sawopebuniwir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/xuruxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3648/2458/files/gofozupexijofubavinokog.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_off0000aad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAD0 5760 bytes
SHA-256: 8c45b6223078fc0d6bfd0f0436d95b54d1089a237ab588bbc033b4891e57f79f
font_01_sfnt_off0000be6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 14032 bytes
SHA-256: c10d244cb743e9bbd054b8cdfebd5e37a21504f77c9673f182b380635c5e9a32