Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bbbc0d0d676fbe…

MALICIOUS

PDF

44.1 KB Created: 2020-08-21 14:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1a209f79a48f17058e6e0eeaf97d495 SHA-1: a34f9622b0dd1db0ab0a386170f2a6da109ff19f SHA-256: d4bbbc0d0d676fbe5903a1a761bccbb6f791a26034103198cb88c00f7dd9ed4d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is used in conjunction with a lure for 'avg antivirus pro apk android'. The document body, though heavily obfuscated, also contains this URL and references to AVG Antivirus. The PDF also exhibits a link farm behavior, with numerous embedded links, many pointing to Shopify domains, likely for SEO poisoning or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=avg+antivirus+pro+apk+android
    • http://files.livingroomseattle.com/uploads/1/3/1/0/131070588/ab7d24660414.pdf
    • http://files.forestfreshproducts.com/uploads/1/3/1/4/131453256/7664b0c984.pdf
    • http://files.southmadisonunite.org/uploads/1/3/2/6/132695489/rafeturexodori-lamixogevev-pujefapiv-sufifa.pdf
    • http://zugez.howtocatchanyfish.com/uploads/1/3/0/8/130813786/rupasif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/sojefosaxamos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6312/files/archery_king_game_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/7494/4153/files/50912726249.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/17350474436.pdf
    • https://cdn.shopify.com/s/files/1/0429/8588/1753/files/ruminant_and_non_ruminant_animals.pdf
    • https://cdn.shopify.com/s/files/1/0435/6135/3371/files/48656616574.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/jadilafediwubepakev.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/pdf_biodata_format_for_marriage_for_boy.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/pittsburgh_sleep_quality_index_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5087/files/acidosis_y_alcalosis_respiratoria_y_metabolica.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_off00006e65.bin
c81c3a5166486074c1e22e2abdb1b6db1ab7eadedb6708b110b80db91dbf5429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E65 5208 bytes
font_01_sfnt_off00008036.bin
400b8dae2975ad064195a788e1860f9347c53627e396e56384a806ed552ee4d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8036 10300 bytes

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