Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0fb5cd679087c0…

MALICIOUS

PDF

44.8 KB Created: 2020-08-31 15:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9be3a4c42c76be60d08721a537911e3d SHA-1: 5ed706c4364dbf1e81986d167d6de93a106b60dc SHA-256: 3d0fb5cd679087c085b0f1958c557aaaa10019cf56fb459dee081463afaaf63f
150 Risk Score

Malware Insights

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

The PDF document contains a link farm and a direct link to a known malicious redirector. The document body, though obfuscated, contains text that appears to be a lure for the malicious link. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a further stage of the attack. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a link-farming technique to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=lamplighter+london+guideline+sheet
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/40878203312.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/faa_far_91.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/fusuril.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/93817816851.pdf
    • https://static.usrfiles.com/ugd/8b2c09_a5ba1ee7a5c34161bc83592866d9d736.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9af7a790e93473fa6d4c3bc2c228543.pdf
    • https://static.usrfiles.com/ugd/b8c837_d762bab8e367463a80d8b9eff268446d.pdf
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/puradibaloteletunazum.pdf
    • https://cdn.shopify.com/s/files/1/0434/9011/5748/files/65906020855.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/vusosofapopaxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pizegavegip.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/ecoflex_10_plus_heatex_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/fotono.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/oxford_picture_dictionary_english_german.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7224/files/65558981394.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_off00006c59.bin
be4fdcbacd81897764c37896b6d2874fc0b7351fabf1e5187ac8102adbf2885a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 5312 bytes
font_01_sfnt_off00007e3a.bin
778b5cf9459bb3330de4672fd22e94cd1570f23acceaeac98b93cdd364680479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3A 12492 bytes

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