Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0516134e9041ad…

MALICIOUS

PDF

33.8 KB Created: 2020-08-12 14:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28231aa4c36951cdf69130a34cb6ec50 SHA-1: 6a4c215d5b44411c28da65055c999582eb819eff SHA-256: be0516134e9041ad963ed976a72faa138060a9d7ed8b9b8c004decbcccf8e3ea
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to a high number of embedded links, many of which lead to a redirector service. This suggests a phishing or social engineering attack where the ultimate goal is to direct the user to a malicious site. The document body contains garbled text and embedded URLs, reinforcing the malicious intent. 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=damodar+seth+poem+in+bengali+pdf
    • http://buxizaga.busybeesrathkeevin.com/uploads/1/3/1/4/131438405/9a808943ed5c1.pdf
    • http://files.jr7music.com/uploads/1/3/2/7/132740838/bulated.pdf
    • http://files.desertcrewphotography.com/uploads/1/3/1/6/131607232/b4d7d20c.pdf
    • http://files.holidayinslovakia.com/uploads/1/3/1/0/131071243/727a3541f1fce.pdf
    • https://cdn.shopify.com/s/files/1/0432/1188/2655/files/tenulibagekaxodibuwofewo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/xefepimad.pdf
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/unity_remove_component.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1738/files/nts_electrical_engineering_mcqs.pdf
    • https://cdn.shopify.com/s/files/1/0453/2790/9019/files/zujovakibimezipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1237/files/10184311030.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/58906717430.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/prevalence_of_iron_deficiency_anemia_in_pregnancy.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/al_quran_complete.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/viluzusifuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/jaguvowulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89573664631.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_off000043b7.bin
48a09b33fc088046c5c1dfe6c48ba5889324d5042fb194d1765f1462ab78b96a
pdf-font-stream PDF embedded font (sfnt) at offset 0x43B7 5592 bytes
font_01_sfnt_off00005694.bin
1d1038cc086ee4d7dd99663c712b9583239e4fe95447bbc19e7cc266c6f8e804
pdf-font-stream PDF embedded font (sfnt) at offset 0x5694 10060 bytes