Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd533632b0715f1…

MALICIOUS

PDF

49.3 KB Created: 2020-08-20 13:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d6412fc98faae68725ef5d45599831 SHA-1: ee752700223103a9afa48e85b270e078f8788d34 SHA-256: 4dd533632b0715f15fb9a303482783f4785b09ddc462bab085bafd687ef24378
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one identified as a malicious redirector (ttraff.cc). The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the attack pattern. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=ansys+apdl+truss+problem+pdf
    • http://wepusegi.sp-arms.com/uploads/1/3/1/4/131453718/jefojowatinizi_vojifizas_zizawofelilebad.pdf
    • http://sujaj.federfarm.com/uploads/1/3/0/8/130814328/ganup.pdf
    • http://gabevev.foodandwinecyclingtours.com/uploads/1/3/1/6/131636725/wifatedururer.pdf
    • http://files.hareandtortoiserunwalk.com/uploads/1/3/0/9/130969717/1f0760e54549d55.pdf
    • http://files.mylenebaxterconsulting.com/uploads/1/3/0/7/130776416/6319479.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/armorseal_1000_hs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/buffalo_bisons_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/80434601597.pdf
    • https://cdn.shopify.com/s/files/1/0435/0866/2440/files/jepigatituwewexagodu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2735/6056/files/quotations_marks_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/mukutotanigapewudepu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/19600990690.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/fovaforutefuzogimab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/xojotulon.pdf
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/teachers_day_quotes_in_english_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/fajuxojebugubiguxepozun.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/71650857102.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_off000081dd.bin
b5cb6e7f3496fcb2e5d0ab6200fd2718b9a435aa567ebe8cde016faf3627ff60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 5420 bytes
font_01_sfnt_off00009433.bin
0c1fafcb4ae736c138b185abe8cefa076aba9174f41c4fbd84f4605ea074702e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9433 10532 bytes

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