Malicious PDF — malware analysis report

Static analysis result for SHA-256 46aa9654f401729e…

MALICIOUS

PDF

48.9 KB Created: 2020-08-01 15:55:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6cfe625ae6e20f5b02def31df7f3dc5a SHA-1: 2e162a004912e9b448a6fd53cd265ef02aee917b SHA-256: 46aa9654f401729eaae9d7ef097023f963801a614d920826283b597643fb28cc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to academic material and URLs, suggesting a lure to trick users into visiting malicious sites. The ML classifier strongly indicates malicious intent, and the presence of redirector links supports a phishing or malware distribution campaign.

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.cc/pify?keyword=vector+calculus+6th+edition+pdf In PDF document text
    • http://files.gabibest.com/uploads/1/3/2/6/132681501/7426947.pdfIn PDF document text
    • http://files.7mountainschurch.com/uploads/1/3/0/7/130739621/745980.pdfIn PDF document text
    • http://files.canolfaniaithbrogwaun.com/uploads/1/3/2/6/132695714/gopevulu.pdfIn PDF document text
    • http://files.mrflemingscience.com/uploads/1/3/0/8/130874488/9f21f53a971084d.pdfIn PDF document text
    • http://files.fluidartcreative.com/uploads/1/3/1/4/131453588/betikakivatuw-wipiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/79223235583.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/gugafone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/dozejotirezis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0401/8336/files/84673727857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/49075099500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3731/0632/files/east_v_west_bowl_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/tefakakixivezilugita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/nujunojizudazurelidideru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/woxoronozibagobiked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8610/9086/files/28911914392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/59977222528.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7455 5244 bytes
SHA-256: e7970f4a2f49915145c8e30efd4a3e23aa693ab974812d6a311074e1d1065c45
font_01_sfnt_off00008613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 9988 bytes
SHA-256: da2f8061cc126689452af33dd64a4173f222d7b4b594f07330830130c1d710f8
font_02_sfnt_off0000a83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA83F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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