Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5ab226266b3d63…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 10:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de45d325c61856e7179c9b9a47bd2735 SHA-1: d42c082b997925b135467a52c48e5a0c33ac9b6a SHA-256: ee5ab226266b3d6393adb4c707a38da6bf0051168f6a9cfaf47e652378d7f74b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or scam attempt where the user is lured to a malicious site via a link disguised within a document.

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/wix?keyword=cory+gregory+get+swole+pdf
    • http://bbcom.me/11IOD1t
    • https://cdn.shopify.com/s/files/1/0440/6919/1832/files/tf-_cbt_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/54170379437.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/84091310398.pdf
    • https://cdn.shopify.com/s/files/1/0437/9534/9666/files/exploring_psychology_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2753/files/mujurevis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/caste_category_list_in_karnataka.pdf
    • https://cdn.shopify.com/s/files/1/0462/9502/3776/files/12374129524.pdf
    • https://cdn.shopify.com/s/files/1/0446/9299/6252/files/thailand_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0437/9138/4736/files/74139076931.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9949/files/73432601811.pdf
    • https://cdn.shopify.com/s/files/1/0434/7510/7990/files/bhakti_yoga_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/graphing_linear_equations_vocabulary_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/list_of_verbs_and_their_nouns_and_adjectives.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_off00006582.bin
17f07f44d405933078dce1ec73231bd2afaaaa96958c10259377637effacde90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 5100 bytes
font_01_sfnt_off00007708.bin
988ea47afe5c763ae9c306dbaf41e269e7afe241c150a51fd64d2ee49b4acab0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 9852 bytes