Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c8ef28d9d23444…

MALICIOUS

PDF

44.9 KB Created: 2020-08-03 09:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07cd28eb5ced41582e98c6062a8105ad SHA-1: f87507f12e2299d8b068ae8eacfa6ab78f8c391a SHA-256: 85c8ef28d9d23444379276aba132eb4b709f5008aca97392a9308541da3a4d03
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, which is a common technique for distributing malware or phishing pages. The document body text and embedded URLs suggest a lure related to 'Suicide Squad' and movie streaming, aiming to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, supporting the presence of malicious redirector links.

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=suicide+squad+123movies
    • http://files.alaskafoodie.info/uploads/1/3/1/4/131453610/zofodarosezo.pdf
    • http://files.roddypaine.co.uk/uploads/1/3/1/4/131453823/xerusafajifabiguloti.pdf
    • http://files.wildberrypicnic.com/uploads/1/3/0/9/130968996/5715072.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/55957122204.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/jebimut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/78871477330.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/dell_xps_410.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/gilazipeviweto.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/57109032416.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5708/files/12001354303.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/tafewukudisefona.pdf
    • https://cdn.shopify.com/s/files/1/0432/4818/9603/files/68022923786.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000649a.bin
a557a9124f4403c92d7aa7fefeef60f445de1f9c3632ae6ea1fbfee3f262ffd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 3388 bytes
font_01_sfnt_off000070bf.bin
840db7863669f3386af26b7848692bd258a0a0bcf262c96d0a425a66aa1cf7b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BF 5596 bytes
font_02_sfnt_off000083c7.bin
7d385d17f11ef817f301f74199f331939c1d2defaae3b0213e8280be8fde39d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C7 10112 bytes