Malicious PDF — malware analysis report

Static analysis result for SHA-256 69776556c8ab67e4…

MALICIOUS

PDF

48.5 KB Created: 2020-08-15 01:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 644163c2ea3b876fae698a4efd5bbb45 SHA-1: 46ab5fbbe9a29119a1d46917bfcc64aab6dbd832 SHA-256: 69776556c8ab67e4c8fd5c6f36d8f88ee0b0f5a8a20ce96588aa59dcf4159fc7
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to email templates. The presence of a link farm heuristic further indicates an attempt to distribute malicious links, likely for phishing or malware distribution.

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.ru/pify?keyword=examples+of+email+templates+in+salesforce
    • http://kuzijilep.hmong101.com/uploads/1/3/0/7/130738909/477474.pdf
    • http://xevar.thewaterthieves.com/uploads/1/3/0/9/130969754/d774ae49.pdf
    • http://woxokekop.photonomadtours.com/uploads/1/3/1/4/131406749/5503769.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/29572801779.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/ashampoo_free_anleitung.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8418/files/changeling_the_lost_2nd_edition_baker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0434/4496/1436/files/29208306266.pdf
    • https://cdn.shopify.com/s/files/1/0434/7543/5677/files/66823936968.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9622/files/42978033286.pdf
    • https://cdn.shopify.com/s/files/1/0431/5270/3645/files/lexus_sc400_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/lusukumotasunawikuj.pdf
    • https://cdn.shopify.com/s/files/1/0455/4273/6037/files/definition_of_child_psychology.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/24590829650.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/rubuvofejudalavevigoxopuv.pdf
    • https://cdn.shopify.com/s/files/1/0443/0325/3660/files/chaplin_1992_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/makaxuvimerapiwa.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_off000072bd.bin
19d00cb768b71fc2986902e331b21ab7d95cb99ec2d6092882b26e1736dd5d2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BD 4972 bytes
font_01_sfnt_off0000838b.bin
989fe1f71f7fb31c8d702881687022da827e7a262780490771f8da45eb199213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838B 10132 bytes
font_02_sfnt_off0000a632.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA632 4324 bytes

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