Malicious PDF — malware analysis report

Static analysis result for SHA-256 847945fae3f4a2a7…

MALICIOUS

PDF

48.1 KB Created: 2020-08-08 15:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b49f25452811dccd1348f8b5d06367f SHA-1: e974847fcd26d20b9d272eb6c4e191500d330daa SHA-256: 847945fae3f4a2a7f867daec0c723cd820b63c9304206456876038066419c260
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=molarity+and+molality+formula+pdf', is flagged as a malicious redirector. The document also exhibits characteristics of an SEO link farm, with numerous links to other PDFs hosted on platforms like Shopify. This suggests a campaign to drive traffic to malicious sites through seemingly legitimate-looking documents.

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=molarity+and+molality+formula+pdf
    • http://files.thelittleacorninmontgomery.com/uploads/1/3/2/6/132695832/nedoxipegop.pdf
    • http://files.centrocha.org/uploads/1/3/0/8/130873870/7918256.pdf
    • http://files.wagsthedog.org/uploads/1/3/0/7/130775665/5196758.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/3495/0304/files/3032615513.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/functional_requirements_and_non_functional_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/a_b_c_murders.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/632816095.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/carti_istorie_academia_de_politie.pdf
    • https://cdn.shopify.com/s/files/1/0429/0582/9532/files/66504985047.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/sozonidub.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/23327930580.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/fufejutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/gerasaperajuxowoge.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000709c.bin
8112059748c29bdc02ba8e99cae966125177b692ff8e9c149b14cec02bb3a419
pdf-font-stream PDF embedded font (sfnt) at offset 0x709C 4880 bytes
font_01_sfnt_off00008118.bin
0fc1ebe91aca3de052ae8e6a6c86e775ae78bc0f54340348811319b97479792c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 10672 bytes
font_02_sfnt_off0000a584.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA584 4324 bytes