Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f00ca13fda815f5…

MALICIOUS

PDF

32.9 KB Created: 2020-08-09 00:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b3d391c963e428c63e464a0e3448ec9 SHA-1: 272def322dac96f16bb28d5dff72de52255a28c2 SHA-256: 6f00ca13fda815f5dbe7e0513606bb1c8b9347b67e6af985b33f9c7ed364a444
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to potentially malicious redirectors or link farms, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=bidayatul+mujtahid+pdf+terjemahan', which is presented within the document body as a lure for a PDF translation. The ML classifier also strongly flagged this PDF as malicious.

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=bidayatul+mujtahid+pdf+terjemahan
    • http://pogumevek.missionpilgrims.com/uploads/1/3/1/6/131637881/74f8f313585135.pdf
    • http://files.istefanous.com/uploads/1/3/0/7/130775191/pumar.pdf
    • http://pepirober.whhsvisualarts.org/uploads/1/3/0/7/130775413/foliwoxewow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/55188079605.pdf
    • https://cdn.shopify.com/s/files/1/0447/3962/5111/files/epidemiologia_basica_ruth_bonita.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/poxelasivifetejapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/9129371314.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8072/files/johnson_seahorse_3_hp_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/71786050789.pdf
    • https://cdn.shopify.com/s/files/1/0434/9929/0776/files/7824906962.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/78191531260.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/degofefoletonezivurisuvit.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9842/files/15607490297.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_off00004440.bin
5ecea41f4e5b3ec0d906bbb7dc1ac14b74a0d5fcadbd7f73f5e4150e6a0f91d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4440 5332 bytes
font_01_sfnt_off00005648.bin
a25c866abce3430ff07792834f0ea917cfa24dfe53bdbee3393d7c1755fdba5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5648 9512 bytes