Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db1e0fae4cc59e5…

MALICIOUS

PDF

109.9 KB Created: 2020-09-08 14:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f671ff8a647b7e1f51be86a6acd0dbd SHA-1: 81b382104a0625e1e91980b56182115ea87e7f4e SHA-256: 5db1e0fae4cc59e5066d5d6f6c0b5ff9abcf78addbf539a2d3154145a0e3352e
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to a link farm, and one critical link identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a manual and a URL that matches the malicious redirector. This suggests the PDF is designed to lead users to malicious sites, likely for phishing or malware delivery.

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.me/wix?keyword=bizagi+modeler+manual+de+usuario
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/airplay_mirroring_sur_android.pdf
    • https://cdn.shopify.com/s/files/1/0459/2330/3575/files/zadijubawazokevelikobiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9232/9119/files/3906639042.pdf
    • https://cdn.shopify.com/s/files/1/0429/3876/1379/files/87355636902.pdf
    • https://static.usrfiles.com/ugd/41a0b6_04d6cf4f26134259811a7808ad07bf80.pdf
    • https://static.usrfiles.com/ugd/57c819_129b6ac2c5704ca8ab5ee985215fd89e.pdf
    • https://static.usrfiles.com/ugd/33ab24_caa86e83148942e68c6f841cc7b6c079.pdf
    • https://static.usrfiles.com/ugd/4542d9_4a32bb21b5cb46eb9f42fd7d8def87a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca7214c10c1b47438db081708e9ff2ce.pdf
    • https://static.usrfiles.com/ugd/cb2bed_43ffb444479640ce990083d1bd151a3c.pdf
    • https://static.usrfiles.com/ugd/baef12_0800495208ec48db9a6760538ed18bc7.pdf
    • https://static.usrfiles.com/ugd/516793_1bd432032e684f43aadb97cdba39081f.pdf
    • https://static.usrfiles.com/ugd/4c4e45_2e5f00843eaa40458756f044421051dc.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_c352da15319642cda05a67a6505beefa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001652e.bin
bba7bdd69a4171c31639be747600400b48a30df3320bf71ed6f75a2bfdc40121		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1652E 5048 bytes
font_01_sfnt_off00017635.bin
b97d9eb982b7e4e11f753b58d6f1f7d17d4c11f830edf9fdf294cda6948b78bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17635 10676 bytes
font_02_sfnt_off00019aa8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19AA8 4324 bytes

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