Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6633bd8a92403ab…

MALICIOUS

PDF

86.2 KB Created: 2020-07-31 23:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19c9244a006a19fc71563bc82df29e12 SHA-1: d474d66e7135524315bb5332750b2652a721905e SHA-256: f6633bd8a92403ab3033e000906dc8950ee6867bd7a31ca00a67b87607e9972d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', are likely part of a phishing or scam campaign designed to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=population+variance+formula
    • http://files.serviceprograms.org/uploads/1/3/0/7/130775556/fe9ea8bcf535e49.pdf
    • http://files.hometownpridecs.com/uploads/1/3/1/0/131070144/riwavumisi.pdf
    • http://files.hwange-schools.com/uploads/1/3/0/8/130813898/2533512.pdf
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/29507860384.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/70555272214.pdf
    • https://cdn.shopify.com/s/files/1/0431/8278/4676/files/15010825329.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/lunesilorovus.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojedeteremedadedarovir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/82246113303.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/lopegewuzogifiloxat.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/gonodufekew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/33898910347.pdf
    • https://cdn.shopify.com/s/files/1/0428/8207/2732/files/ratadebulawafigus.pdf
    • https://cdn.shopify.com/s/files/1/0434/6436/0100/files/41887535157.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/manadowaminidojuxita.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1b.bin
529d2907f05eed9a0ed326776bb2acbbfae86df26ee89b53cece4cfda541b9b5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 5044 bytes
font_01_sfnt_off0001003f.bin
96522824e1635b25223d90aabc7f5e84f2eaf94b9c435a031e9f1384f7a86711
pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 16632 bytes
font_02_sfnt_off0001348b.bin
ef45bd0278095074cb526031936742e072dfd46bb23032ae68e77cab6c2ab9de
pdf-font-stream PDF embedded font (sfnt) at offset 0x1348B 16660 bytes