Malicious PDF — malware analysis report

Static analysis result for SHA-256 58db0d4afdab548a…

MALICIOUS

PDF

97.6 KB Created: 2020-08-27 15:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20a0f22bfe926f2105271b3784ef7f06 SHA-1: 8f7e88d5a452137c13c6121af8a7d3a3412aabb2 SHA-256: 58db0d4afdab548a1f6600823c1ee2f8888c3de648b685cb4e16b39332dddc61
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=hibbeler+dynamics+solution+manual+pdf`. Additionally, it features a PDF link farm heuristic, indicating a large number of external PDF links, with `https://cdn.shopify.com/s/files/1/0438/3614/5814/files/niwajonibaboxelobakovom.pdf` being the first listed. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains text related to 'hibbeler dynamics solution manual pdf', suggesting a lure.

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=hibbeler+dynamics+solution+manual+pdf
    • http://files.wildegg.com/uploads/1/3/1/3/131381804/nuwomuxojuw_pidazerepobega.pdf
    • http://files.wellbeings-feelbetter.com/uploads/1/3/1/4/131437535/pajogudegiruzi.pdf
    • http://jukasepuw.smlwa.org/uploads/1/3/0/9/130969699/7123825.pdf
    • http://files.chslibrary.info/uploads/1/3/2/3/132303010/xomebelo-xutubose-deroxuxura-dakesomuta.pdf
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/niwajonibaboxelobakovom.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/zudipifazoga.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/29433267373.pdf
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/51187514305.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/data_analysis_with_r_tony_fischetti.pdf
    • https://cdn.shopify.com/s/files/1/0428/1047/4663/files/neurological_disorders_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/68303822444.pdf
    • https://cdn.shopify.com/s/files/1/0435/4709/9290/files/meaning_of_curriculum_development.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/97541286638.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/zevuzigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/auto_bazos_skoda_forman.pdf
    • https://cdn.shopify.com/s/files/1/0433/0301/0468/files/95294002220.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/mafaripuvufesalunoxuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/nekidituripusubezekutaf.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_off00013257.bin
bb20750050a5407cf1248af501b91e0fa528133216ae4f4ff3e37a5c4dc2fc06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13257 5504 bytes
font_01_sfnt_off000144ea.bin
a2d88a5d963faace86d7b5ccafeffe07bc040d2ce4771a7b1d5974cb4b77c670		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144EA 16404 bytes

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