Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabea8664a8008f1…

MALICIOUS

PDF

57.1 KB Created: 2020-08-31 00:50:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f65fd94aa67d911aea1e563338cc012 SHA-1: 24e84a63dd515d56bd180d12ed43a6218afaba40 SHA-256: dabea8664a8008f1d8dcd0008953358f793e9e75a37b556f3ae205b7f349f13e
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a song download and the malicious URL itself. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous links, suggesting a spam or phishing campaign. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=ghoomar+rajasthani+folk+song+free+download+mp3
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/adobe_cs5_5_master_collection_serial_number.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/celula_eucariota_vegetal_muda.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/engineer_cosmetic_loadouts.pdf
    • https://cdn.shopify.com/s/files/1/0437/8732/1505/files/jufuvefifokunogugen.pdf
    • https://cdn.shopify.com/s/files/1/0429/4760/8730/files/zitopon.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/32979927573.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/asurion_att_affidavit.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/neoclassical_literature_authors.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/xabimebejugazuperiba.pdf
    • https://cdn.shopify.com/s/files/1/0464/8842/0520/files/wojaferefonat.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/antenna_tv_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/90105523056.pdf
    • https://cdn.shopify.com/s/files/1/0432/3537/7307/files/36485758283.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/mefefelenopojuvilenip.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_off00009810.bin
5be9f2e35dcf82b56e80e67139fc6afaf858e2f1e9eff3e1558a54dae9ed9227
pdf-font-stream PDF embedded font (sfnt) at offset 0x9810 5884 bytes
font_01_sfnt_off0000ac10.bin
a03877ad0a5dc37f69ff62690aa1b09bb6af9a3466d8bc01c70a7cdf62761f60
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC10 13764 bytes