Malicious PDF — malware analysis report

Static analysis result for SHA-256 42bb7c1c0a1574d2…

MALICIOUS

PDF

50.1 KB Created: 2020-08-04 15:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15ccd79d2627616403637c4f9eb1889a SHA-1: 2254aa6f44062e7f9102e5d5cfc48fa47a6449d7 SHA-256: 42bb7c1c0a1574d285c3464385ece600b3c0bb4c8cc01bc8beea465bf5f5a489
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains numerous embedded URLs, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic identified a direct link to a known malicious redirector at https://ttraff.ru/pify?keyword=tahan+kadambari+pdf+download. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=tahan+kadambari+pdf+download
    • http://files.stjohnsallegany.org/uploads/1/3/0/9/130969352/5650234.pdf
    • http://files.kangaroohavenwildliferescue.com.au/uploads/1/3/1/6/131606874/vuxunuxen.pdf
    • http://files.tntelitesportsacademy.com/uploads/1/3/1/3/131398006/xolugipasebod-romakobikesakir-kujeputufox.pdf
    • http://files.niamhfarrell.com/uploads/1/3/1/6/131606121/wazuxexuzi.pdf
    • http://files.instituteofbiblicalstudieschicago.org/uploads/1/3/0/8/130874011/09d184042b47.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/91384333642.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/mimiborafim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/kumubusogasabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/fuvoxerixizavuresivop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/9437175143.pdf
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/4890504518.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/bujanonejobax.pdf
    • https://cdn.shopify.com/s/files/1/0438/4371/5229/files/skripsi_akuntansi_perbankan_syariah.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/zuxatexipetinirodisido.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/89288028467.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/43935988565.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/71597423159.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000863f.bin
0dc3772c0e7f79adf4082ae1b6d553157bafc7e863e790e7f3587334e104437e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x863F 5348 bytes
font_01_sfnt_off0000984e.bin
981dd064ba003aa742e41413be5ba11e18a3d59c01b427807fe43f91c9ba212f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x984E 10220 bytes

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