Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ab314c3d60f8f3…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 19:54:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 196ae6306706f8f2f07aae313b1bff28 SHA-1: b84d789c654f883fa9dd5a2246bf59146fda4925 SHA-256: f5ab314c3d60f8f3eadb68b3b95ced2c66b0d49adca72ce7c0d3090193511e0e
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though garbled, contains text suggesting a lure related to a 'retail store business plan sample pdf'. The primary malicious link is https://ttraff.cc/pify?keyword=retail+store+business+plan+sample+pdf, which likely leads to further malicious content. The ML classifier strongly indicated maliciousness.

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=retail+store+business+plan+sample+pdf
    • http://files.ariaisa.com/uploads/1/3/0/7/130740256/9882426.pdf
    • http://files.chawnaschroeder.com/uploads/1/3/1/3/131380308/gerewasoro.pdf
    • http://files.carsandcrochet.com/uploads/1/3/1/4/131407164/vujugixosesaxa-zofawezazekat-nuxatuvavatar.pdf
    • https://cdn.shopify.com/s/files/1/0431/6033/8586/files/36210761155.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/43617663568.pdf
    • https://cdn.shopify.com/s/files/1/0438/3296/7318/files/72759421630.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/zowisupoximifimipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8084/files/69225661033.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/32227413.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9384/files/google_e7_bf_bb_e8_ad_af.pdf
    • https://cdn.shopify.com/s/files/1/0429/8188/4067/files/rivotetebavawexix.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/salibinowiripen.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/83516406669.pdf
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/kalerosuxejeda.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/ruzafitusalujeferiziva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/69174191621.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_off0000640f.bin
ef3ce6bd0b6ab43fdc9a1d1014eed88957666f241d79d1ac18ff5d1051b5dea0
pdf-font-stream PDF embedded font (sfnt) at offset 0x640F 5332 bytes
font_01_sfnt_off00007615.bin
51ea1cd472331f122ef3f4a72956c5852e67edc4ff2b297053bb53aeb2e0fc63
pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 10036 bytes