Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d1bbca3bbfef0d…

MALICIOUS

PDF

38.6 KB Created: 2020-08-25 01:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0d4c36a0171c29ea186bf3db8228b03 SHA-1: ddd43b7d8d0a81435d93469beff253201d068fef SHA-256: 62d1bbca3bbfef0dab92c109f3a180864cd18ac9c184ef732497a28099b3c149
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body, though heavily obfuscated, contains the same redirector URL and a list of other URLs, many hosted on Shopify, suggesting a link farm or content distribution network used to host malicious files. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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=sheetrock+lift+rental+near+me
    • http://files.westmauir2r.com/uploads/1/3/0/7/130739062/gibat.pdf
    • http://files.easw.net/uploads/1/3/2/7/132740214/labunikoxis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/40527787837.pdf
    • https://cdn.shopify.com/s/files/1/0462/3515/6631/files/xerobilosurebimon.pdf
    • https://cdn.shopify.com/s/files/1/0460/1371/0503/files/akb48_ponytail_to_shushu_single.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/61735280405.pdf
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/26175645012.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/wekijewokirutuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/subog.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/livre_pour_apprendre_l_anglais.pdf
    • https://cdn.shopify.com/s/files/1/0448/4818/5501/files/sekezek.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/biology_exploring_life.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/goridokoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1148/files/motion_sickness_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/30963175232.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_off000059f2.bin
8c685744f45767fce3c80fac5ca808396f321bcdf532fc34256f6801bceded39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F2 5112 bytes
font_01_sfnt_off00006b26.bin
c1bf9eca582f30719f4186f30ffdffdf5ee43729b529504723c03080619ac863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 10160 bytes

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