Malicious PDF — malware analysis report

Static analysis result for SHA-256 39415a2ff29ace26…

MALICIOUS

PDF

41.9 KB Created: 2020-08-04 21:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 205f47c3f7f034f8a6af03f3888623fb SHA-1: 225727bc1f373c96df1470bf8be0d082b8924c3f SHA-256: 39415a2ff29ace26b2ec358d090e445c8b378dca772329102daa39da789a9cab
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=albacea+peru+pdf', is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body is heavily obfuscated, but the link farm heuristic strongly indicates malicious intent.

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=albacea+peru+pdf
    • http://files.flexgridtech.com/uploads/1/3/2/7/132740723/fuzodemevuvili.pdf
    • http://files.fauxmesticgoddess.com/uploads/1/3/1/8/131856381/gevaxil.pdf
    • http://files.gillsargent.com/uploads/1/3/2/7/132740338/zinerumubimi.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/truck_dispatcher_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/watevajut.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/8679381775.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/zizet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/tv_paint_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/1570263904.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/balance_sheet_components.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/smith_wesson_22a1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/comment_relier_plusieurs_ensemble.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/5298701574.pdf
    • https://cdn.shopify.com/s/files/1/0431/0764/7639/files/tomixis.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/xudofelofawog.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_off00006643.bin
3a5485eb90cd7db190f118a7e92441255d0c58ae63b737886287abf3af90965b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 5100 bytes
font_01_sfnt_off000077a9.bin
0b1e99529a7fbc4938422fd33573b21b144eaa6d0587a3b4b1bf94b560899d0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x77A9 10380 bytes