Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9ecbbedc1d80c6…

MALICIOUS

PDF

44.9 KB Created: 2020-08-02 04:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda3e52b7b2166df75c5eeab2229072b SHA-1: fa4553c2886240e182bbce9b5230a82ed857e1fe SHA-256: 8a9ecbbedc1d80c6e7fdd158a4cf8aaeca38955177fcbd131b7b671d7bdd6a91
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the text 'How to stop mac from sleeping' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links also indicates a link farm, likely for SEO poisoning or to distribute further malicious content.

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=how+to+stop+mac+from+sleeping
    • http://files.swinganoia.com/uploads/1/3/1/6/131607440/subarijonel-joluzira-mobubo-niwawigese.pdf
    • http://files.christianfitnesstv.com/uploads/1/3/0/8/130814070/gawukipixadivekulute.pdf
    • http://files.readingfamilyaid.org/uploads/1/3/0/9/130969965/3306600.pdf
    • http://files.newleafkineticarts.com/uploads/1/3/0/9/130969061/zozeruratorinexawak.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/53184611620.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/74085283354.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99397771733.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/72059317166.pdf
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/ding_fries_are_done_family_guy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51851907441.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/51208925142.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/sufixuvidifura.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4840/files/ralink_linux_client.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.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_off000071c6.bin
7c38c47d8e6dc1e1bea218a4043c1ea1065a8d7af11e53eac574835c43551d18
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C6 5388 bytes
font_01_sfnt_off00008413.bin
26f218d6ab04ef2b89534b671289977f425db5d532c3cc2a0c8b280463df2cef
pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 10156 bytes