Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b01a4191548845…

MALICIOUS

PDF

58.5 KB Created: 2020-08-08 18:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63e623f17be9dae574f5ce1e82ed3e4 SHA-1: 9d19100f1e66e94484a78da7605d02a52f04595a SHA-256: 62b01a4191548845492a89b5dc570dd0f882c77fc3f3a84a17aacbbcb1cc52c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to host further malicious content or phishing pages. The document also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting an attempt to manipulate search engine results or distribute content broadly. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=principle+of+atomic+absorption+spectrometer+pdf
    • http://files.jennytownsendlcsw.com/uploads/1/3/1/4/131453749/9313784.pdf
    • http://files.stlaurentsocialstudies.com/uploads/1/3/1/4/131453944/2291a9c52e392.pdf
    • http://files.philscrap.com/uploads/1/3/1/1/131164054/10a80574.pdf
    • http://files.thaddeusproduction.com/uploads/1/3/1/8/131871902/gumatadevab_nozuxinirenu_nururigigofugu_lisesovevezod.pdf
    • http://files.kempnerumc.org/uploads/1/3/1/4/131453005/6dbba2d1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5349/9046/files/ff14_archaic_enchanted_ink.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/wotifebibiwoxewipokode.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/9949847508.pdf
    • https://cdn.shopify.com/s/files/1/0430/7795/9833/files/virenilesuvejugusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/wajasano.pdf
    • https://cdn.shopify.com/s/files/1/0428/4570/0262/files/buribimuwame.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20675343362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzibuwusupamodugibeboz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8581/files/56866633599.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/10499600469.pdf
    • https://cdn.shopify.com/s/files/1/0438/2670/8640/files/farmall_h_service_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a636.bin
776190334201066c0b50f58dc73e2f2146013b9a2b370bb2a9eba2112869e52c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA636 5444 bytes
font_01_sfnt_off0000b89c.bin
b6fc15f8936801718fd604e3f2ac2e25020a190406b4bc7c0614371ab8cdfc43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB89C 10516 bytes

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