Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02c139ac5a89299…

MALICIOUS

PDF

71.9 KB Created: 2020-08-17 01:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eaac29bf5b7a4c6e2dec314fceaefa3b SHA-1: 1aec2ae14004972080f06ab86b2bd423c081cbfd SHA-256: a02c139ac5a89299a8dccb15eff5af3cf0479ca67e1c5faf540634803d5300f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to trick the user into visiting a malicious site, likely for further exploitation or credential harvesting.

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.com/pify?keyword=luigi%2527+s+mansion+3+ign+guide
    • http://files.infinitefitness.studio/uploads/1/3/2/6/132681033/bdd501fb8f231.pdf
    • http://womebogu.buypolarxtracts.com/uploads/1/3/0/8/130813765/luzetopafogu.pdf
    • http://files.dancemobility.org/uploads/1/3/0/8/130814605/2580239.pdf
    • http://files.shoalhavenhighschoollibrary.com/uploads/1/3/1/4/131438392/8bc96e1a3b194b3.pdf
    • http://files.njcultureclub.com/uploads/1/3/1/3/131379183/3923978.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/clicker_heroes_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0436/1660/0227/files/8950641553.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/18586943727.pdf
    • https://cdn.shopify.com/s/files/1/0428/9311/5558/files/lavukumedukapujefep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/lojonadu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/5125613826.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/80238419333.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/vufoviwado.pdf
    • https://cdn.shopify.com/s/files/1/0437/8191/4781/files/teori_behaviorisme_dalam_pembelajaran.pdf
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/51488683853.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/57841289165.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_off0000dc95.bin
703841b586eac11881649aa2a57c2b4260609d2c5a5850b47a9facdd5b9354c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC95 5156 bytes
font_01_sfnt_off0000ee12.bin
d0b6e6c5f9d03b4ac9774a3f17b859a414a2b21ab0f7d17cfc9fa4a258700c85
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 10636 bytes