Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fb34539bce00e2…

MALICIOUS

PDF

46.4 KB Created: 2020-08-26 06:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f76811ba12287e99a8575ed4ef00ec9b SHA-1: 14d2dbf7a0e4bcbcf964f4e39d140e33709c26a5 SHA-256: c4fb34539bce00e283e52411f58ac38f2e446d994d441674e8138f795dd149e0
152 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is disguised as a job application CV template. The ML classifier strongly indicates maliciousness. The document body and heuristics confirm the intent to redirect users to malicious content, likely for phishing or malware delivery.

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=membuat+cv+lamaran+kerja+pdf
    • http://files.lotusranch-homes.com/uploads/1/3/2/6/132681336/3524769.pdf
    • http://womitopu.tikkunconsulting.com/uploads/1/3/0/7/130738971/3b7d4c4b67.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/interview_handling_skills.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/57845644427.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/handbook_of_alcoholic_beverages.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0160/files/83529937964.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/minor_arcana_tarot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/ketoasidosis_diabetik_anak.pdf
    • https://cdn.shopify.com/s/files/1/0432/7725/4814/files/random_bible_verses.pdf
    • https://cdn.shopify.com/s/files/1/0432/1394/7041/files/city_of_heroes_powers.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/tesujoxikuxavaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/tivarojozafuvalur.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/meselasonaxunokejin.pdf
    • https://cdn.shopify.com/s/files/1/0463/6019/9323/files/suzox.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_off00007680.bin
13293eec5dd47d725c96550e048c14cfde428309025299ec00fa180d00df7101
pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 5468 bytes
font_01_sfnt_off00008910.bin
6aeb729481665d56b58a5da467e3f9e2c4a0948dafafd8b87b3a2b2f99f318af
pdf-font-stream PDF embedded font (sfnt) at offset 0x8910 10352 bytes