Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c7be1c67f8e1c7…

MALICIOUS

PDF

41.6 KB Created: 2020-08-29 23:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e394f5b4690c19d4b141466f016b65b5 SHA-1: ae43c616c620e3a3b9bcb5cbb98e3b87238128c8 SHA-256: e2c7be1c67f8e1c7cc141decf3c4bc825cbd338e880f83bfe80fad7b687e61f6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/wix?keyword=wow+engineering+guide'. This URL is presented within the document body, suggesting a social engineering lure. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=wow+engineering+guide
    • https://cdn.shopify.com/s/files/1/0440/1322/4094/files/93196109296.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6549/files/septra_dosage_forms.pdf
    • https://cdn.shopify.com/s/files/1/0451/4965/1098/files/application_for_us_passport_fillable.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/46758475577.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/80712042396.pdf
    • https://static.usrfiles.com/ugd/0511f5_e89f0f8a02954674b9992a8b3913b67b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae7f3d9bb53748aea81954be1bb67ec9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c44407b9b901460694c3080e5b5616a2.pdf
    • https://cdn.shopify.com/s/files/1/0434/4669/8146/files/agudas_llanas_y_esdrujulas_ejercicios.pdf
    • https://cdn.shopify.com/s/files/1/0460/7705/1044/files/anari_song_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/kefapof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56325204281.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8158/files/basic_electronics_engineering_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/wow_vanilla_warlock_epic_mount_quest_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7269/files/fikisod.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/18164037655.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/wabakevax.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_off00006741.bin
9838085c0deb1b35f6eaecc9bd32e898258b5b5cf8cbb47a83f16436e484c1aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x6741 4680 bytes
font_01_sfnt_off00007755.bin
f86e8083d0439458a4404acd77e1965eddaf660d729041d2184ea732bbe94eac
pdf-font-stream PDF embedded font (sfnt) at offset 0x7755 9996 bytes