Malicious PDF — malware analysis report

Static analysis result for SHA-256 741578a60bb18104…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 16:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d5ac0d026871beaeafac470aaca0b9 SHA-1: ab8d5fe903066e46f1f8e3bed3978ff22aa50c86 SHA-256: 741578a60bb181048782ad7c801495e1dec4b6cb2151023b41b779834b5801a5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection scheme. The primary malicious link, 'https://ttraff.com/pify?keyword=buy+android+phones+in+nigeria', is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, indicating an attempt to lure users to malicious infrastructure under the guise of product listings.

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=buy+android+phones+in+nigeria
    • http://sewajeb.helenperrettceramics.com/uploads/1/3/0/8/130813650/vavatanofuw.pdf
    • http://bowujesuj.ballyloobyns.com/uploads/1/3/1/6/131636908/9246052.pdf
    • http://gusapir.teamirelandgolf.com/uploads/1/3/0/8/130814328/rudejekiditulusul.pdf
    • http://bamulinir.vikkiconley.com/uploads/1/3/2/3/132303163/gopipekar.pdf
    • http://files.chicagoforklift.com/uploads/1/3/0/7/130740256/jututubajaz_nuloxaguf_pemoxiwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/512381250.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/kejanelomik.pdf
    • https://cdn.shopify.com/s/files/1/0433/2617/7438/files/68723907554.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/zufuzulovatosufevagasulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/fungi_and_protists_packet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/tifepanisurepike.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/redovimujadiroku.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/dojometakirijave.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/zidubilupuvemegajugati.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006007.bin
a4c01091f2ec5747b5efc7777aa683a599a6000ca5d9e57542b89050bb02a332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6007 5144 bytes
font_01_sfnt_off00007175.bin
b8cb1ed0f8f0cf52b5044e65f3dfe0b27c45dcc678ea473a5d3827138f79d0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7175 10308 bytes
font_02_sfnt_off000094b6.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B6 4324 bytes

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