Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cc7525b61461c7…

MALICIOUS

PDF

41.7 KB Created: 2020-09-01 05:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cedf347e0a233acf7b938756fd7539da SHA-1: 5fe3ec9d58dd6a70d461aad9cc5bb7aef29f466b SHA-256: 67cc7525b61461c7e0ac6e0437852ac5157559636d1c7e4d4d147026d8917188
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm designed for SEO manipulation or to distribute further malicious content. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a probable phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=template+powerpoint+free++minimal
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/lidofevebusozuxazeti.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/manual_ar_condicionado_portatil_pinguino_pac_c105.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/67401910982.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/logical_reasoning_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/rumobeguzepex.pdf
    • https://static.usrfiles.com/ugd/e1c37d_b3913c769e0c4bf58f688893b434fba6.pdf
    • https://static.usrfiles.com/ugd/286fb8_553be7e2f3f24f8c8d7bfc4c5f1b8adb.pdf
    • https://cdn.shopify.com/s/files/1/0434/3762/1404/files/2004_acura_tsx_automatic_transmission_problems.pdf
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/cintas_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0453/6886/9019/files/latiratujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/75400646760.pdf
    • https://cdn.shopify.com/s/files/1/0434/6970/1280/files/lumiviz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/teen_cream_pies.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/31126700821.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/biwifipajadizitinerafagul.pdf
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/60054003605.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006696.bin
a6f3cdc787942e4eca8b69dfb890450603c33e30b1e2b453fed61bf2d996e531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 4908 bytes
font_01_sfnt_off00007741.bin
df5aae3a38d8d644fd073406570dd5e7970225ac532d52d77011b172541be373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7741 9980 bytes

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