Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5442a8664c095e1…

MALICIOUS

PDF

34.8 KB Created: 2020-08-02 00:18:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e626c25d267c000a976706e227c62c78 SHA-1: 526cf07107fba8b40202769651dbdfceaafcb23f SHA-256: f5442a8664c095e1631bf020e852aab5699af9825c8d7509cafe324b04b3fb80
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body text, though heavily obfuscated, contains a URL that appears to be a lure for downloading a finance textbook, which redirects to a known malicious domain. This suggests a phishing or social engineering attack aimed at redirecting users to malicious content.

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.cc/pify?keyword=principles+of+finance+6th+edition+besley+pdf
    • http://files.pointpleasanttradingcompany.com/uploads/1/3/1/3/131398336/rizarojirupava_befelef.pdf
    • http://files.emilysvalley.com/uploads/1/3/2/8/132814050/rogosefimodelusegub.pdf
    • http://files.paulmitchellartist.com/uploads/1/3/1/0/131070317/sumodevetis.pdf
    • http://files.artlynchactingcoach.com/uploads/1/3/0/7/130740316/bowubab_xopefokage_ruwoxabutaxora_nugofoxevima.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/setiloxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/dopuxiwafela.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/dariluzunuzedazodiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50833930904.pdf
    • https://cdn.shopify.com/s/files/1/0429/3646/7623/files/95850170015.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/zideresovevifamamom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/vusutif.pdf
    • https://cdn.shopify.com/s/files/1/0432/5805/2763/files/terraria_heavy_workbench.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/49202383589.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/58503514915.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/matimipufazivevadotuz.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/zimidesivo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000488e.bin
36ff4f1ff7960b2dc90dbdca6bc7dcf9939cb61786c4d36fbb6041e558e6a78d
pdf-font-stream PDF embedded font (sfnt) at offset 0x488E 5640 bytes
font_01_sfnt_off00005bae.bin
a2cc1d0aa8872aef164bae8c02a536da2d38382191e2eee728dea6264651f319
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAE 9592 bytes