Malicious PDF — malware analysis report

Static analysis result for SHA-256 b383a06ca7626e93…

MALICIOUS

PDF

59.1 KB Created: 2020-08-06 21:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f756a4a3eef4fd252b7fc512220874 SHA-1: 348400cbc2f9cbc315134402fe289b9709abff0f SHA-256: b383a06ca7626e932bbee0c929aa744b221204c62a377f4585af50316ee8a8c6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to 'arterial blood gases pdf'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious links broadly. No scripts were extracted from this sample, but the primary attack vector is the embedded malicious URL.

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/wb?keyword=arterial%20blood%20gases%20pdf
    • http://files.operationhood.org/uploads/1/3/2/3/132303388/7719923.pdf
    • http://files.pakenhamspiritualistchurch.com/uploads/1/3/0/7/130775518/velitevev_jijekovok_faviriserugo_limotilopep.pdf
    • http://files.awake-mysoul.com/uploads/1/3/1/3/131384025/3241862.pdf
    • https://cdn.shopify.com/s/files/1/0430/4817/3722/files/all_algebra_formula_file.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/rockford_il_crime_rates.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/cbse_class_10_maths_question_paper_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4815/files/35160929881.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/aws_certified_solutions_architect_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/nufivawaweti.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/aberraes_cromossomicas_numericas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/17371725375.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5525/files/65029936648.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/5624612702.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/vowefazemadotomaba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088b8.bin
322a9f3593dbfa2fb769927f3a81be9a34874de2c58ae1927e1768d0b50ad84e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88B8 5336 bytes
font_01_sfnt_off00009ae6.bin
1c85983de1b9f6cbaad7f886b2cc2aeebc161641e304e2576e7b4c4e627ea5b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE6 15428 bytes
font_02_sfnt_off0000cb1f.bin
a7fd1637f88583be41db22b6c1c7d99d29655ed450f70959f8206d6f961c8101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1F 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.