Malicious PDF — malware analysis report

Static analysis result for SHA-256 c554dbc8e68743be…

MALICIOUS

PDF

52.7 KB Created: 2020-08-09 23:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8cd4bda63788cfc3a10ad122a82d90 SHA-1: e80f99bfa134a62374c9b56d7f0f2ea3a09629ad SHA-256: c554dbc8e68743be97e8b789850e7aa4512b3f87f44f16491b8cfff2549eb56f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, appears to contain the same redirect URL. This suggests the primary goal is to trick the user into visiting the malicious URL, likely for further exploitation or credential harvesting.

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=accuracy+vs+precision+worksheet+pdf
    • http://files.philadelphialogisticscenter.com/uploads/1/3/1/1/131164476/jokimolomi.pdf
    • http://files.nemslax.com/uploads/1/3/0/8/130874627/5339460.pdf
    • http://files.clouddanceralpacas.com/uploads/1/3/1/4/131453255/269dd.pdf
    • http://tatup.insurance4vacationrentals.com/uploads/1/3/1/3/131398020/5867174.pdf
    • http://files.annaclairecalligraphy.com/uploads/1/3/0/8/130813953/95f39b2.pdf
    • http://files.annaclairecalligraphy.com/uploads/1/3/0/8/130813953/95f39b2.p
    • https://cdn.shopify.com/s/files/1/0432/6067/4210/files/82066791875.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/ditekukiwitezaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/5693/9676/files/zusodibefilibenijuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/9736/6436/files/38594027457.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/88227763884.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/11698717451.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/98514900269.pdf
    • https://cdn.shopify.com/s/files/1/0431/1154/7037/files/zotatu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/59637902597.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/39675565944.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/rojerokesumovefatinelat.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_off000085bd.bin
572101abbfc63a7d246bf05faa97c8675225f97febfcd18a5b486a5c99d59863
pdf-font-stream PDF embedded font (sfnt) at offset 0x85BD 5520 bytes
font_01_sfnt_off0000989e.bin
92da37a3e3d99285e4f449c1a7e3fa3e581b043f4c121b58d9b06f88be487ab5
pdf-font-stream PDF embedded font (sfnt) at offset 0x989E 14188 bytes