Malicious PDF — malware analysis report

Static analysis result for SHA-256 127ca38ce43431c3…

MALICIOUS

PDF

42.8 KB Created: 2020-08-04 21:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49b9516152e17aee328a954fd5170cb SHA-1: 6fb5b8580cbefbfb51ba8e3f3d3cd0d56b22860f SHA-256: 127ca38ce43431c388b9d63931b29c743fdcf39a91c888fade2e41b585f8404f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains text suggesting it's a catalogue, which is a common lure for phishing or malware delivery. The presence of many external PDF links, some pointing to potentially malicious domains, further supports this. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.ru/pify?keyword=crompton+ceiling+fan+catalogue+pdf
    • http://files.gaylereicheltart.com/uploads/1/3/1/3/131383604/bopofefimedub_mutalunero_kolod_nesowun.pdf
    • http://files.pp-personalprotection.com/uploads/1/3/1/0/131069863/lofunavix_jobip_pimilupowipan.pdf
    • http://files.zivadancer.com/uploads/1/3/1/0/131071164/3980378.pdf
    • http://files.freeoursexuality.com/uploads/1/3/0/8/130874143/budigonixawababibo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/2040/9256/files/78500752715.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3639/files/caprice_24_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/8806/8254/files/42834548341.pdf
    • https://cdn.shopify.com/s/files/1/0429/6726/9532/files/fivabosetasixixelemewag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/2733148701.pdf
    • https://cdn.shopify.com/s/files/1/0432/8656/0936/files/9755557417.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/administrao_hospitalar_fundamentos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/pugobiposikodilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/909040323.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9968/files/55881780829.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3557/files/juzawofatexidale.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c6.bin
ef2ac540641c90a6aa8036b3c9ff1270fbd66824cfdb574160009d9d3d16f0d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C6 5204 bytes
font_01_sfnt_off0000635e.bin
b34c7291d2d64068fb12abf09e24c4bb645928ae521837a00ce8c9470b41f80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635E 10544 bytes
font_02_sfnt_off000086cf.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CF 16164 bytes

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