Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc377762c1277c74…

MALICIOUS

PDF

54.4 KB Created: 2020-07-30 18:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 292f8ce2fae9a9bea560c319c0153ee0 SHA-1: 6d1a04de83a310fe675b409837735a120f3516d5 SHA-256: dc377762c1277c74eb18ad960ea5abf6f9790a460e7b682f691b07373ba22478
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm, with numerous links to external PDFs, including one hosted on 'cdn.shopify.com'. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

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=air+compressor+safety+inspection+checklist+pdf
    • http://files.southshoreeldercareconsultants.com/uploads/1/3/0/7/130776031/31b38c5e26842.pdf
    • http://files.hepto.org/uploads/1/3/2/6/132696154/xirusutufap.pdf
    • http://files.davidsmothers.com/uploads/1/3/1/8/131856772/gepobijenagul-jizakiso-vegumira.pdf
    • http://files.davidsmothers.com/uploads/1/3/1/8/131
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/jajimerifotobepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5929/0022/files/95425919072.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/jezoxadoron.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/xelojeleku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/fasewez.pdf
    • https://cdn.shopify.com/s/files/1/0434/2461/2508/files/nirinaxibifuvonusosulo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/wolituvewewovaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/29813010488.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/18451099861.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/8080905596.pdf
    • https://cdn.shopify.com/s/files/1/0439/0299/2536/files/94280798180.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/7391486032.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/bosutigegojopa.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_off000098a6.bin
3258ce146ace60e059847d2c94926999f13cbfae0ebf8c3185a0b98d38561cab
pdf-font-stream PDF embedded font (sfnt) at offset 0x98A6 5340 bytes
font_01_sfnt_off0000aa96.bin
512f329a9e5f7131d603388c1d126b53650035402e21dd744f14a654874c1655
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA96 9968 bytes