Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9d318cd43955c6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 15:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fba033215db2caf6f339d1a8d75e59ba SHA-1: e5b553773cca93e540c2fa0fe13bdc872dac2f8c SHA-256: 5e9d318cd43955c63cbafeb1c1fd625fb2b200ccb6a71bdafeb62bac108c3b0f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify, suggesting an attempt to leverage SEO or phishing tactics. The ML classifier strongly indicates maliciousness, and the presence of a redirector points towards a potential download or further compromise.

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.com/pify?keyword=taco+bell+baja+blast+nutrition+information
    • http://files.thomaschristopherhaag.com/uploads/1/3/0/7/130739214/48605f4a2af9d.pdf
    • http://files.historyspeaks.org/uploads/1/3/1/3/131379111/f13cb.pdf
    • http://files.cottonginmuseum.org/uploads/1/3/0/7/130740252/duvalawureke_vigibowekuf_xalifib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/zosaperotupivupozor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/takigirawidajugor.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/mamatorosibog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/18192835394.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/titipagatan.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2153/files/types_of_aluminum_alloys.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/nafesinaxovuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/falenevit.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/medical_work_experience_certificate_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/violin_notes_for_malayalam_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/guzuwopokevamazupiref.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/jupoxulufepapufoj.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_off00005d53.bin
f8ccf16d320596418b4ae2b827fad248f359c773229c94bf307c44a13fdea114
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 5192 bytes
font_01_sfnt_off00006ee4.bin
26ffc203c03a2aceedf763444f1487b9804a15f0339c97df803474323f53c5a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 10572 bytes