Malicious PDF — malware analysis report

Static analysis result for SHA-256 269a1d2bcb6038fe…

MALICIOUS

PDF

41.3 KB Created: 2020-08-24 06:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1382bf3bdf398e6bf8e59cb8e2397519 SHA-1: 37807e39c5b5e0d4406571bd3fb140006315f912 SHA-256: 269a1d2bcb6038fe2e9157adbde62dc5bfdfd4bd699f0df3a5cfb8e64bdb456a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=alphaeasefc+software+free', which is also flagged as a malicious redirector. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, including several on Shopify. The primary intent appears to be directing users to the malicious ttraff.com domain under the guise of a software download.

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=alphaeasefc+software+free
    • http://files.mscrystalhaggard.com/uploads/1/3/0/7/130740053/fobosel-ridizuf-sijixaxesi.pdf
    • http://files.emhager.com/uploads/1/3/0/8/130874110/zilusujumerilavile.pdf
    • http://files.centurioncabinets.com.au/uploads/1/3/0/8/130874358/bejejafara.pdf
    • http://dusefig.kullaf.com/uploads/1/3/1/1/131164250/munuribefufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0555/files/brahms_clarinet_quintet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/6984087496.pdf
    • https://cdn.shopify.com/s/files/1/0428/0687/0183/files/advertising_agencies_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7284/files/42089369817.pdf
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/padefetoso.pdf
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/69317303423.pdf
    • https://cdn.shopify.com/s/files/1/0440/1243/7662/files/finixufevepatikiporugubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/65148668079.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/suxafugalifivawoxelajog.pdf
    • https://cdn.shopify.com/s/files/1/0447/7665/2949/files/47601255266.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/tipos_de_inteligencia.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_off000062cb.bin
2864a9dce6129c793cadb2f9e91a37b43fbce0ef2cad8cf4a6f34580a5bd80e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 5184 bytes
font_01_sfnt_off00007474.bin
df73e4adcca43570d7e189d5dbbaa6c0250ced4aab379d8f3da9723247e73d50
pdf-font-stream PDF embedded font (sfnt) at offset 0x7474 10536 bytes