Malicious PDF — malware analysis report

Static analysis result for SHA-256 1518ba15e2bcac3a…

MALICIOUS

PDF

39.4 KB Created: 2020-08-08 12:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d05145647bc965f8d6c90652a23d1c0 SHA-1: 6fc800e4f1847ec51793615d07aba0df32bbcf11 SHA-256: 1518ba15e2bcac3a40a00b164274e4c526a72a8d23019066bdcde12b6d5a5cbf
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'probability theory and random processes' related content. The presence of multiple PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=probability+theory+and+random+processes+by+p+ramesh+babu+pdf
    • http://files.bleedingheartsbotanicals.com/uploads/1/3/0/7/130775221/2089274.pdf
    • http://files.pennybrumbaugh.info/uploads/1/3/0/9/130970009/4fd0b227283.pdf
    • http://files.lincolnmain.com/uploads/1/3/0/7/130775405/d629e40e65.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/rexovilofogej.pdf
    • https://cdn.shopify.com/s/files/1/0433/3826/8827/files/rewiviz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/39777337374.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/deep_thoughts_by_jack_handy.pdf
    • https://cdn.shopify.com/s/files/1/0437/4485/4165/files/nupaxu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/catia_v5_part_assembly_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0441/0854/6200/files/how_to_update_nexus_7_to_marshmallow.pdf
    • https://cdn.shopify.com/s/files/1/0440/4481/2438/files/tokajekow.pdf
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/gukiwusat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/61062583224.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4011/files/documentation_of_clinical_pharmacy_services.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/24542111432.pdf
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/sonabijiluziganob.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046a5.bin
d533e06af1602db69bac58f97f210350063bba05010a237766e5668983530cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A5 5640 bytes
font_01_sfnt_off000059a0.bin
191194976aaeb83cd94aa395454c399f5984cb3bdc420872e9f4b1ed031ca362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A0 9608 bytes
font_02_sfnt_off00007a9e.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9E 16164 bytes

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