Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcbd40531f69c03…

MALICIOUS

PDF

48.7 KB Created: 2020-07-31 21:22:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61addea7fc3a3791386c0d288e6018d3 SHA-1: 69518587a03aa5edf169863b8bacd78bda6a0bc8 SHA-256: 6bcbd40531f69c038353eb056ee917273b02c93cd4e94cd355fe5b414f36b744
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of embedded URLs and the link farm heuristic suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=kril+tsuroth+osrs
    • http://files.wagsoflove.com/uploads/1/3/1/4/131438468/4c413834e9df.pdf
    • http://files.lorenasantacruz.com/uploads/1/3/1/6/131637178/zafaridavajanudilana.pdf
    • http://files.evolvetogetherpdx.com/uploads/1/3/0/9/130969148/4924064.pdf
    • http://files.guidedexposure.com/uploads/1/3/1/3/131380728/82201.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/jolosagunap.pdf
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/tijatefugezewi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/zanetobafizemugapeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/60507431438.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/tisifi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/gugel.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/4873000792.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/7094429584.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/vumeluni.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/48684298000.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/95693050835.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/42277967427.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/dowitesonirelinizuzapo.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_off00007cdf.bin
cee09d8550a97777d7b99405958f24311280916c9ec719a7c8db2c0d2a176412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDF 4532 bytes
font_01_sfnt_off00008c43.bin
954f486845ad836b214ebb557281e32d62fb08abc19b394306c9842a533f05f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C43 13004 bytes

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