Malicious PDF — malware analysis report

Static analysis result for SHA-256 094c8c316bd1a763…

MALICIOUS

PDF

34.8 KB Created: 2020-08-06 17:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6622d27cca1e57f7be64fd7aebe20e9 SHA-1: 73ca572f294f74e532642f50e04057c1e4df3d52 SHA-256: 094c8c316bd1a763efc4ccf4002ae26b21c7d4a2f063dead85f2c22324435175
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to distribute further malware or phishing content. The document body, though malformed, contains the same URL and appears to be a lure for users seeking drawing exercises. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to increase visibility.

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=isometric+drawing+exercises+with+solutions+pdf
    • http://files.anaturalselectiongsd.com/uploads/1/3/0/7/130775286/mimesiwami-lamatan-tuvimananiz.pdf
    • http://files.southshorecruisingclub.com/uploads/1/3/1/4/131453902/bofunevaze.pdf
    • http://ratap.grazinggreynacres.com/uploads/1/3/1/3/131379362/ruxijepabus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/siriramaxirosamuxufav.pdf
    • https://cdn.shopify.com/s/files/1/0432/1627/3563/files/dumurusawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65105912314.pdf
    • https://cdn.shopify.com/s/files/1/0437/2240/8087/files/pdf_on_kindle_paperwhite.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/botevirozixulapige.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/21241882276.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/14093907063.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/nisemupuxilupefedokakawu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/7741762009.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/65656683632.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/7125314662.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_off000048f5.bin
4d36939695b7148eb09e1597da069ebefaca3e614eeb32ca826d5d8f90f38cbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x48F5 5664 bytes
font_01_sfnt_off00005c26.bin
bfe0a209cc9a1755da8e30f956d717f3bcaf7ed851be4e2098107f10f0443df0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C26 10108 bytes