Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce416c41c3271fda…

MALICIOUS

PDF

46.4 KB Created: 2020-09-01 23:56:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fc67556598965991c7a86ddab3e84559 SHA-1: 3cec88cbc1de0eff447ae41d92e063b497fe539c SHA-256: ce416c41c3271fdac9b64f2b5fe229282ecc11e59ade9889e6001e4f128eb474
154 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.ru, which is disguised as a translation app. This indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL and references to translation apps, reinforcing the lure. The presence of numerous embedded links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to drive traffic to the malicious redirector.

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/wix?keyword=english+to+spanish+translation+app In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/formal_neurological_assessment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/visefoxepevexetorekepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/6553/1557/files/12858762807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8296/3349/files/18855913155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2ee03e23c7834b4badc25baf5bd52fd3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/04e6f9_5ebe0f13ba6f482db19346123ad1b963.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/52b593_933aa4f586b5401eb4c80c7099d56700.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a20e788625ca40f48a0a18d7e7271231.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/270e53_569e6a31d4f646c480708fba0028ee19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8728/1832/files/dawuwuvajivibuzosekeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/51927010937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5179/5107/files/11551481264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/best_swing_trading_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/79919630747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/vokenijusesiliw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/zetilipolimegidozebojuv.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7998 5036 bytes
SHA-256: 816a2bd5a02e5443c2a7d5f6c453edb3bd5eb8e617cb62af5c22b9e3c7fad448
font_01_sfnt_off00008ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB7 9968 bytes
SHA-256: ef973b851bd3b52a960f07e53c45fe99c882861e04f028f7b761c73aa3e83d9b

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