Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9e63e63c48b118…

MALICIOUS

PDF

44.2 KB Created: 2020-09-10 11:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1515562bee1b787c1cc8542e4012066 SHA-1: a70d05adcae621a4d82581bc8c9a5740627e89af SHA-256: ce9e63e63c48b118393fc9c56f71422270d0f3d0c68c87e5e151137bc4f98d48
152 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for containing links to known malicious redirector infrastructure, specifically 'ttraff.link'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding a large number of external links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary malicious link identified is 'https://ttraff.link/wix?keyword=carcinoma+de+celulas+escamosas+em+gatos+pdf', which likely serves as a lure to a phishing or malware distribution site.

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.link/wix?keyword=carcinoma+de+celulas+escamosas+em+gatos+pdf
    • http://files.mmisd.us/uploads/1/3/1/8/131871980/f2c26c0f65c8.pdf
    • http://pureme.buzzsalonnorthfield.com/uploads/1/3/1/6/131606111/fusef.pdf
    • http://files.yourpanamatours.com/uploads/1/3/1/4/131412032/6386831c5f8492.pdf
    • http://tamire.myhillchurch.com/uploads/1/3/2/7/132740763/vopewo-rebal-betuzolov.pdf
    • http://files.linedanceturkiye.com/uploads/1/3/1/4/131453214/2747479.pdf
    • https://cdn.shopify.com/s/files/1/0430/9785/0010/files/xivevobida.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/nuzilimanap.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/tijisevaxuduwul.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/sepeselufujaresuxuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/6223/0181/files/69744025450.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/ruzuvan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/free_jeezy_album_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/icu_report_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61286624564.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/impulse_buying_behaviour_project_report.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_off00006af0.bin
fae3ece078951c0ae8cc439326b9c2f1c115286b0ea24fc7057dbd52f322e1df
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF0 5380 bytes
font_01_sfnt_off00007d22.bin
870fcbcf65c47bca3ee78107ca10f770ebdb09d147ec2f0c30921146a0cbe45d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 12548 bytes