Malicious PDF — malware analysis report

Static analysis result for SHA-256 711f2bec14c3c0be…

MALICIOUS

PDF

51.8 KB Created: 2020-08-28 01:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 629d0e0d00144373b15b14b4482e2c87 SHA-1: 48e8761e8604f55db0d2afbd1e57614036fe43c8 SHA-256: 711f2bec14c3c0be429c8fc4182bb8edc7712baf96b232160f0fb133f206f5bd
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download for 'autodata crack install'. It also features a link farm of numerous PDFs hosted on Shopify and other domains, likely to improve search engine ranking for malicious content. The presence of a 'download button' heuristic further supports the deceptive nature of the document, aiming to trick users into clicking the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=autodata+crack+install
    • http://wunaviz.curetypeone.com/uploads/1/3/1/3/131379578/luzapikawo.pdf
    • http://files.micheles-musings.com/uploads/1/3/1/4/131406403/gekesinifus_kiritebed_nowezemaxe.pdf
    • http://mutitosi.sisterssangha.org/uploads/1/3/0/9/130969521/rurodaduro.pdf
    • http://dafenabo.bagwelldesigns.com/uploads/1/3/1/3/131384635/lisuliworokiz-raxixaki-piroturekezux.pdf
    • http://files.createitdiystudio.com/uploads/1/3/1/3/131383541/xeliralaxiwagulonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/chauffage__reflux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6975/1967/files/manual_de_apicultura_moderna_edicion_actualizada.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/85297426091.pdf
    • https://cdn.shopify.com/s/files/1/0435/8825/5912/files/dieta_brucia_grassi_uomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/terozozolufawenivede.pdf
    • https://cdn.shopify.com/s/files/1/0431/1577/4108/files/2330077878.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/jalep.pdf
    • https://cdn.shopify.com/s/files/1/0437/0992/3481/files/tatejevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7175/6698/files/wiwulodalegag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/47027539661.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/affidavit_form_nsw_ncat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/12557526367.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3282/files/sefuzexagixabilo.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4c.bin
f85ef1620e351005116ba4d90c5d72e9807158c60fc6508469855ea32873be4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4C 3240 bytes
font_01_sfnt_off000078f7.bin
04ada5f7cf70dfe8ccfa083a7e005eb4bad85df07d6419912913984ad79183dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F7 4984 bytes
font_02_sfnt_off000089f3.bin
7c84491f5bc7567bc48feca8814286121d2c0ba8d57251c93f15cdb0ad698ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 10192 bytes
font_03_sfnt_off0000ad06.bin
026a586128736d29da6542416095f0b483470add235992e736c82304e06d1e5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD06 16064 bytes

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