Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b941307c4374595…

MALICIOUS

PDF

43.1 KB Created: 2020-09-11 03:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec726a57bd43f58303474aa2b279091 SHA-1: 047453dd37d04a8c06a8d13fd8c66fa5821e80a0 SHA-256: 6b941307c43745953661c6f59e2139acaf170617fbf7b1e30291b6b6849cdc17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a redirector service, which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'APC smart ups 1500 installation guide'. This suggests a phishing attempt to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=apc+smart+ups+1500+installation+guide
    • http://gogobov.misneraudioprograms.com/uploads/1/3/1/6/131637047/nonotat.pdf
    • http://files.bhawanimaa.org/uploads/1/3/0/7/130739648/632af4fa.pdf
    • http://pawuwez.cantonohiolandscaping.com/uploads/1/3/0/7/130776321/3998718.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/62511959305.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/jexudedoleg.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/in4mo_task_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/armored_god_game.pdf
    • https://static.usrfiles.com/ugd/575363_22697b696a89409aa3e8525e29fd7cc5.pdf
    • https://static.usrfiles.com/ugd/81ef4b_f2f6a92846ad489489c1bcda5a559a75.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/bldc_motor_driver_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/3499278690.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/gazowovefiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1526/6713/files/59238094365.pdf
    • https://cdn.shopify.com/s/files/1/0428/7568/2972/files/chadariya_jini_re_jini_audio_song.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670f.bin
6422d9050efec17ac2485858539db1909ba6ce4c73925dfa7927f69c56fb6407
pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 5700 bytes
font_01_sfnt_off00007a5c.bin
e6ae3b1b00e44ff9f97eee27179236f2fedb0874d006744360fa1fbe07188e64
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5C 10392 bytes