Malicious PDF — malware analysis report

Static analysis result for SHA-256 01625db773c3eafb…

MALICIOUS

PDF

46.1 KB Created: 2020-09-10 07:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58f3e32346e3ba3b6e1b0d2dded79d77 SHA-1: ec5ed44228116d9520c6709f6e1bbbe65460de33 SHA-256: 01625db773c3eafbfcf75e236eece0ea2feee29896625057d46f8a19dea56d17
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The primary redirect URL leads to a page with a keyword suggesting a lure for 'startup slide deck template'. The majority of the linked PDFs are hosted on domains associated with malicious infrastructure, indicating a coordinated effort to distribute potentially harmful content or phishing lures.

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.club/wix?keyword=startup+slide+deck+template
    • http://zixiroj.abs-lao.com/uploads/1/3/0/7/130739720/nopanawipadaj.pdf
    • http://files.prime-runner.com/uploads/1/3/1/3/131381679/f09bf9dad.pdf
    • http://files.bellinghamdisciples.org/uploads/1/3/0/7/130776327/betukapugoparipedi.pdf
    • http://najabivov.preciousinvestltd.com/uploads/1/3/1/0/131070197/ravuwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/xatimojukijapa.pdf
    • https://cdn.shopify.com/s/files/1/0429/4803/4716/files/40948954959.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9222/files/98349659385.pdf
    • https://cdn.shopify.com/s/files/1/0455/7848/5925/files/games_like_fortnite_online_no.pdf
    • https://cdn.shopify.com/s/files/1/0446/6851/8563/files/dojeruwobexukegikiravugil.pdf
    • https://cdn.shopify.com/s/files/1/0428/3590/2631/files/petiw.pdf
    • https://cdn.shopify.com/s/files/1/0464/7183/9896/files/66332985752.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/caat_audit.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4338/files/govupebinogalerajuve.pdf
    • https://cdn.shopify.com/s/files/1/0437/0166/5960/files/james_herriot_all_creatures_great_and_small_free_download.pdf
    • https://static.usrfiles.com/ugd/4cd51e_d711ac545a774fc29a9dc5bdd08f96b2.pdf
    • https://static.usrfiles.com/ugd/1cfe37_b879b750fc3045fba135e30242fad31a.pdf
    • https://static.usrfiles.com/ugd/cafc24_4f29018b145b4f25a9011aca01ab17ae.pdf
    • https://static.usrfiles.com/ugd/3d0627_e2edf56fa4a74b61870c9bb3606731fd.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_off000076ee.bin
8356288880210247e3c74bbc6f4d6abd841e3d88a5ab45f6fcd80156e7921dfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EE 5384 bytes
font_01_sfnt_off00008929.bin
46a7334eb9d1f5d4256fac6b90f4a2fbd9649e48935b594e1df148e9e17aa252		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8929 10096 bytes

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