Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2a457114dcb42f…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 03:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3101fff5bbdf2614b41b7cf6b1b76f89 SHA-1: c0b8345ed8d1ac1d84bf2973cc8eb1c91e1a1310 SHA-256: 2f2a457114dcb42f1465f95d1eefde2162acbcc145e500a21192612b3f1ce16e
152 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 'https://ttraff.cc/pify?keyword=android+auto+apk+4pda'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same malicious URL, reinforcing the intent to redirect the user to potentially harmful content.

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=android+auto+apk+4pda
    • http://files.allanmcintyrefineart.com/uploads/1/3/0/7/130776819/1757538.pdf
    • http://files.saintlukebv.org/uploads/1/3/1/6/131606491/kobaxisoteporaxexego.pdf
    • http://legup.moorestudioarts.com/uploads/1/3/0/9/130969985/gotuxokudoweka.pdf
    • http://saraf.gardenmarketstore.com/uploads/1/3/0/7/130740066/5971589.pdf
    • http://fapejoset.elliottfamilyreunion.com/uploads/1/3/0/9/130969723/7719988.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/gimp_2._8._22_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/33315716521.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/70614685349.pdf
    • https://cdn.shopify.com/s/files/1/0432/5287/5432/files/bedudapaditabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7207/7475/files/lumazupivapub.pdf
    • https://cdn.shopify.com/s/files/1/0438/7281/3211/files/rajomewuweteduzujudubi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/fomokeletilonuxavetidokun.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/kefivaluxerazazo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3104/4007/files/81629226441.pdf
    • https://cdn.shopify.com/s/files/1/0437/0631/9001/files/kukakuwexaxa.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_off00005c8a.bin
638a80181a727b799366576cc8c6bc8390654106cbeb2aec20446765ce1b63f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8A 4884 bytes
font_01_sfnt_off00006d3b.bin
8c4b2c56babae306b9efb13198bd76827e859065e29925c970e2cb52d40de3cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D3B 10084 bytes