Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e79c1b77f564213…

MALICIOUS

PDF

38.7 KB Created: 2020-08-13 18:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f750007a3f52782e4470ec024394ea5c SHA-1: f12ca2fe3ec1f46b88962babc1272d0b50d4cd60 SHA-256: 9e79c1b77f56421310c476bb3ae1b5844e2b03c609eb012970e4b1eebba4477e
152 Risk Score

Malware Insights

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

This PDF document functions as a link farm, presenting a seemingly innocuous catalog title while embedding numerous links to external PDF files. One primary link redirects to a known malicious infrastructure at 'ttraff.cc', suggesting a phishing or malware distribution attempt. The extensive list of embedded links, many pointing to Shopify domains but with suspicious filenames, indicates a broad effort to host and distribute malicious content.

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/wb?keyword=catalogo%20rodamientos%20de%20agujas%20skf%20pdf
    • http://files.sustainme.co.za/uploads/1/3/1/4/131453252/legesigimujopimuti.pdf
    • http://xotelen.designersink.us/uploads/1/3/0/7/130739615/bidef.pdf
    • http://files.margaretmidwood.com/uploads/1/3/0/9/130969985/xizurajuregujujixek.pdf
    • http://files.strathendrickrc.co.uk/uploads/1/3/0/8/130814208/fakifotejitikewaxor.pdf
    • http://nelupaked.askweklar.net/uploads/1/3/1/3/131380213/93603.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/importance_of_census_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0432/3406/6600/files/transnet_employment_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/36335557097.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/fobosajozufisoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/easy_baroque_piano_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/65426270492.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/o_level_biology_past_papers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/nuzutam.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/99949966898.pdf
    • https://cdn.shopify.com/s/files/1/0431/3841/6801/files/60156950532.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/bhagwat_mahapuran_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4659/8821/files/tejufuv.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b43.bin
b22ea1b4d8b9bc598c13beb7890e04fc5c52536561d4c05ae815ae0d4494e3d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B43 5408 bytes
font_01_sfnt_off00005d98.bin
28cd1876fc0452134b86cd82ef73621ee2c2ddebf26f31ba6f4fd3baba1df1d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D98 10448 bytes
font_02_sfnt_off00007f8d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8D 4324 bytes

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