Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed0418a2e1fe323…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 02:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d327930226bbaad62b23771032cdfb2f SHA-1: 4e1f1b6736b46216956817cbc4cebd5a4f8f9881 SHA-256: 9ed0418a2e1fe323ae34ff9eff7ac0901423e0d653e258fda2769136d2f07b84
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector hosted on 'ttraff.ru' which is flagged as malicious. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to Shopify-hosted PDFs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of malicious intent.

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=methyl+cellosolve+msds+pdf
    • http://files.douglastilley.com/uploads/1/3/1/8/131871586/tuxofap.pdf
    • http://files.championparty.com/uploads/1/3/0/7/130776147/edd7b7.pdf
    • http://files.maplevalleysugarworks.com/uploads/1/3/1/3/131379894/6258939.pdf
    • https://cdn.shopify.com/s/files/1/0437/3771/0744/files/xajukedupor.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/44841963475.pdf
    • https://cdn.shopify.com/s/files/1/0435/3320/5655/files/17871692302.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/89288358814.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/wibujezojijugedipoxugiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/27337014417.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/arachide_dfinition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/62614850587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20597849085.pdf
    • https://cdn.shopify.com/s/files/1/0434/2490/7414/files/26121600926.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/37583139129.pdf
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/business_english_finance_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/lotetik.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/gefazabazofudivaveleriba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.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_off00006270.bin
f1aa1dad6e03082137e3a59d1b330ac06d80b460cb5af6c3f4ad0e26f71d2311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5256 bytes
font_01_sfnt_off00007450.bin
d307b36fc581884a33bdee9262b724f319ec8f4dff2ce9dd0566606d1e3796bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7450 14848 bytes

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