Malicious PDF — malware analysis report

Static analysis result for SHA-256 074eb329a4be2890…

MALICIOUS

PDF

50.7 KB Created: 2020-08-12 00:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a3351a338d8ad1ac3d289927f1c431b SHA-1: f5bf668b89c00c61112b886181ab7a0045fc3d36 SHA-256: 074eb329a4be28909ce07cc873d14ffa8b3680d022d4fa3d9e73ecae284f9c4f
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying it as a "PDF_SEO_LINK_FARM". One of the primary links, "https://ttraff.com/pify?keyword=thesaurus+dictionary+pdf", is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. No scripts were extracted, but the sheer volume of links and the malicious redirector indicate a high likelihood of 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.com/pify?keyword=thesaurus+dictionary+pdf
    • http://files.marciaoliveirahealing.com/uploads/1/3/0/7/130775537/wenesuzoletuxig_gekovirupojewe.pdf
    • http://files.artfulbarb.com/uploads/1/3/1/3/131398108/7227987.pdf
    • http://files.bethtenhoveart.com/uploads/1/3/1/4/131437987/rofolugo.pdf
    • http://tetez.cascadefactoryhomes.com/uploads/1/3/1/3/131383314/sipitalukerazop_litizuden.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/19517326137.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/51261696427.pdf
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/76631372255.pdf
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/promissory_note_canada.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/boy_scout_handbook_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8466/0380/files/characteristics_of_good_research_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/pakojona.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8550/files/surozepoxisopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/vigugelunematikilokabel.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/pedumom.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2069/files/bsc_2nd_year_maths_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/lonely_planet_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/dukubefalavil.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_off00007b84.bin
253a647a2348f636c5618215482c51fe2bba92c80b51864eeeb8b1041896a835		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B84 5144 bytes
font_01_sfnt_off00008cfd.bin
e5558ea5538cef2a2bc146bfeac072f0e5d3929db12428ad65cffde7757b5617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFD 10120 bytes
font_02_sfnt_off0000af9b.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9B 4324 bytes

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