Malicious PDF — malware analysis report

Static analysis result for SHA-256 7182d96a16b5ae09…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 10:52:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c04624f131798ee1cf45d3a0771f483d SHA-1: 2b80403cfbaf8bb2860331151b58f55ef4dde327 SHA-256: 7182d96a16b5ae09dcca44e9a6c33497d8fbc33e85a552942328ea35025b4547
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure for a 'college botany practical book pdf download'. The presence of a link farm and a malicious redirector indicates a likely attempt to drive traffic to potentially harmful content or phishing sites.

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=college+botany+practical+book+pdf+download
    • http://files.hallsoflondon.com/uploads/1/3/1/0/131070030/34cb781.pdf
    • http://tolukeme.foxchapelnewcomers.org/uploads/1/3/0/8/130814328/tunaxosija.pdf
    • http://files.brooklynprimary.school.nz/uploads/1/3/0/8/130874493/3082819.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/45911690203.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/nokitarozojabiwajolowakuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/34600748018.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/varices_esofagicas_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0432/0215/0557/files/32112968279.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/muzusuzegagapum.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/voduxezozejubudafoluxada.pdf
    • https://cdn.shopify.com/s/files/1/0437/2378/4360/files/equifax_credit_dispute_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/3223/9528/files/wenosuguzulinawugajexew.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/4863019129.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/henry_rollins_podcast.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/lujusefajewog.pdf
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/vugiteda.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/93593606359.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_off000060f7.bin
2c4d1b737a7c45865b1c9ccee39905f7133026d00784599e6711b16ea74879aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 5448 bytes
font_01_sfnt_off000073ab.bin
1aef0a2bdb4fd07c448c55db6a0a9d7c9d322d974f05827146560a1e388b3608		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73AB 9968 bytes

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