Malicious PDF — malware analysis report

Static analysis result for SHA-256 3231066695e1dbd6…

MALICIOUS

PDF

37.2 KB Created: 2020-08-25 05:08:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d67b2a0af69e6092046d99b42c68915b SHA-1: ce8a852142434c37feded6ae2c93d6aec99b594d SHA-256: 3231066695e1dbd6c8915c2b9e65bb8e2e26557413354935593807e3287b875f
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.com), suggesting a potential phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of external links and the presence of a malicious redirector are strong indicators of a malicious intent, likely related to SEO manipulation or hosting malicious content.

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=saucony+guide+iso+2+tr
    • http://files.sctaci.com/uploads/1/3/1/3/131382808/dumekuposu-luxas-majuvamu-gakomedakuruwi.pdf
    • http://puzegoti.theprefabsproutproject.com/uploads/1/3/1/6/131607095/gaxidebojamul-xesuzi.pdf
    • http://files.cuyamacawoodsfsc.org/uploads/1/3/0/7/130738769/5800500.pdf
    • http://files.weinbergfirm.com/uploads/1/3/0/9/130969923/13284e1bfa.pdf
    • http://files.angusskiclub.com/uploads/1/3/1/4/131454345/pelakarire.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/69327158201.pdf
    • https://cdn.shopify.com/s/files/1/0433/6916/9045/files/72829983224.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/blood_relations_tips_and_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0437/7647/5290/files/no_man_s_sky_crystal_sulphide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0787/7017/files/hospital_waste_management_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/58402189604.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/super_fast_english_speaking_book_free_download_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0320/files/yuumi_garen_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/it_books_info.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/97469085931.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/wowef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/convert_to_word_ocr_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8006/4936/files/75199306857.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_off000052a9.bin
13a3cc0f25b9c793c641b4ba4e2a06add161f6d0d4485d2e83e801e7370b89c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A9 5412 bytes
font_01_sfnt_off0000651d.bin
5ea7afa54b63c43ce41aac55ca0f9968a3b0d7891c6defd90d15c4598a671086		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651D 10128 bytes

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