Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4fa389335a199c…

MALICIOUS

PDF

50.8 KB Created: 2020-08-09 03:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cff8b58e2af3d1188b7de5888763afd4 SHA-1: e4694d08541aa513630f34682c7fcbf56116163f SHA-256: fc4fa389335a199cea35826ac6839f10f947ec3e48fcceb48308b6971e24f60e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a redirector service, which is a common tactic for distributing malware or phishing pages. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and the embedded URL points to 'https://ttraff.cc/pify?keyword=sda+28+fundamental+beliefs+pdf'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting the primary purpose is to redirect users to potentially 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=sda+28+fundamental+beliefs+pdf
    • http://files.copenhagentalent.com/uploads/1/3/0/7/130739260/4153518.pdf
    • http://files.winstonmillerconstruction.com/uploads/1/3/0/8/130813330/5d60245d18b.pdf
    • http://files.depedmisor.net/uploads/1/3/1/6/131636930/144b6986b111f2c.pdf
    • http://files.copenhagent
    • https://cdn.shopify.com/s/files/1/0437/2067/1384/files/logituxewonut.pdf
    • https://cdn.shopify.com/s/files/1/0435/3661/3544/files/govejur.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/tavomebafewebigenagu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/bunuvalewiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/23528721436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/24384112885.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/python_remove_spaces_from_string.pdf
    • https://cdn.shopify.com/s/files/1/0451/8805/5191/files/sejarah_berdirinya_bani_umayyah.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/91105189269.pdf
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/mercado_livre_de_energia_eltrica.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_off00008822.bin
f0632b545919859f275cc474675a16c1e07d05682a86d7723a04d232dcd24eac
pdf-font-stream PDF embedded font (sfnt) at offset 0x8822 5660 bytes
font_01_sfnt_off00009b53.bin
06cabdb744d8103f08277bc4dfdd307ba3f5e670c717097f300034ea3d65bc3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B53 10160 bytes