Malicious PDF — malware analysis report

Static analysis result for SHA-256 5edffb7a3527409c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-13 18:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 719712ffc00709b9d4f19e14c639ea38 SHA-1: e71c3b22addf00eda5f08bc7890e5736c6256fa2 SHA-256: 5edffb7a3527409ccc91111966a44e887600b356d5029baf929e487e89e3d122
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link directs to `ttraff.com`, identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the same lure text and the malicious URL, reinforcing the phishing or redirection intent.

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/wb?keyword=manualidades%20con%20tubos%20de%20papel%20higienico%20flores
    • http://files.furiouscrafting.com/uploads/1/3/1/6/131637056/guretiveguxaxaz-rilujezinusez-sisetizeve-jolivawekevej.pdf
    • http://gezakatu.dealswithamy.com/uploads/1/3/1/4/131482975/gawumelesaxezak_furirezu.pdf
    • http://files.zionkearney.com/uploads/1/3/1/3/131379356/7394409.pdf
    • http://files.mideastchef.com/uploads/1/3/1/6/131606343/rejeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/allahabad_high_court_aro_notification_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/67341691369.pdf
    • https://cdn.shopify.com/s/files/1/0437/2614/3639/files/38127510846.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6517/files/aspergillus_parasiticus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/15810762055.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/69650572835.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/80397597786.pdf
    • https://cdn.shopify.com/s/files/1/0431/6433/6290/files/41484131915.pdf
    • https://cdn.shopify.com/s/files/1/0433/8044/1238/files/91888770278.pdf
    • https://cdn.shopify.com/s/files/1/0437/4337/9617/files/the_practice_absite_question_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/50004970013.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_off000061ef.bin
6a509369a14f09fb3885275a81c7d576896e5380e5219ff16d0e1809112543dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 5560 bytes
font_01_sfnt_off000074d0.bin
bfdc1c6ea3f4067f3cda850eb70e1877b8032f4a2d225a1eeb1d88bc7b6a6fcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D0 11276 bytes

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