Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b689fd68742e2d…

MALICIOUS

PDF

44.3 KB Created: 2020-08-17 17:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6821c29ce496e267162729b8b2da44c SHA-1: 471f676929a7a90b89901796e0dfa48254d94ea5 SHA-256: e8b689fd68742e2def0352dbffb9dda7b3d3a8d400a6342ad27885254a37ad79
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body, though partially corrupted, contains keywords related to 'Crystal report path in c windows application' and embeds multiple links, including the malicious one and a large number of benign-looking PDFs hosted on Shopify. This suggests a link farm or redirection tactic to distribute malware or phishing content. 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.com/pify?keyword=crystal+report+path+in+c+windows+application
    • http://files.thechocolatebar.shop/uploads/1/3/0/9/130969340/02f19aa0d64.pdf
    • http://demutev.yogaforvitalitywithashton.com/uploads/1/3/1/4/131408899/6c83c8d3.pdf
    • http://files.lakearlannhomeownersassociation.com/uploads/1/3/1/6/131637024/9940871.pdf
    • http://files.ks-image.com/uploads/1/3/1/0/131070374/4097371.pdf
    • https://cdn.shopify.com/s/files/1/0433/2755/3686/files/signs_and_symptoms_of_appendicitis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/muximoxadexukelakomegav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9489/1943/files/bafodopasimibojepubupilo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/92683336176.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejumilaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/dekaxomijomiluvesap.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/14423859329.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/80668619793.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/apprendre_espagnol.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/giuseppe_conte_curriculum_vitae.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_off000067d9.bin
50c89842b8b119e13e9fcdd2cfe2b9c99eb472c642ac60a4cda5f8441662cc5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x67D9 5260 bytes
font_01_sfnt_off000079c0.bin
97bcd6b8bc356300281782a6359320dda6bab572d45629dc0b19e63f6dd85fb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 14968 bytes