Malicious PDF — malware analysis report

Static analysis result for SHA-256 71627d9ee40c1278…

MALICIOUS

PDF

56.0 KB Created: 2020-08-06 09:35:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec2694064adfaa897281b4ec64fb1a26 SHA-1: 6633a8d08a207d7582d7e602ba06df72b55ea9eb SHA-256: 71627d9ee40c12786ce8391fb2fcb82e18bfefe55822be7ead31cbc3b2cefd76
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a redirector known to host malicious content. The document body, though heavily obfuscated, contains text that appears to be a lure for an e-paper download. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests an attempt to distribute malware or phish users.

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/pify?keyword=dainik+bhaskar+epaper+jabalpur+pdf
    • http://bewowum.ab-intercultural.com/uploads/1/3/0/8/130874329/4d5d1a875a1e5.pdf
    • http://files.clairefort.com/uploads/1/3/0/7/130776042/kesugemagaxu.pdf
    • http://files.rosiescottmassie.com/uploads/1/3/1/0/131070171/jigut-wozoxiwipeza.pdf
    • http://files.allisonmsullivan.com/uploads/1/3/2/6/132681337/d8465.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/59895136821.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/50514286529.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/rilexokusitumipiferi.pdf
    • https://cdn.shopify.com/s/files/1/0447/3470/9914/files/colorectal_cancer_risk_factors.pdf
    • https://cdn.shopify.com/s/files/1/0439/3664/5275/files/lelexefutesazuxiwenutig.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/madusewoked.pdf
    • https://cdn.shopify.com/s/files/1/0429/0845/0972/files/kodusivepidij.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/nuzitilupubuxoludatufeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/98335936989.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6578/files/lexurigem.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/54006466342.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006abc.bin
d2fe2b3653afdb69f47cae9dc89ec8d12478e46c856637d42688c7dbb1382fe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABC 5408 bytes
font_01_sfnt_off00007d17.bin
6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D17 3720 bytes
font_02_sfnt_off0000887a.bin
0555576d1f6f8a2d19d2625e4a7bac3fa3c56fd2a7d7bcc0f0cb0cc0913e6234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887A 10408 bytes
font_03_sfnt_off0000ac46.bin
2004b59f869c5b914acea31d9bdb408a75c07f6ab135ab85debcb16a96fdd58a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC46 12640 bytes

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