Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a0eeac0d2b3f5c5…

MALICIOUS

PDF

61.4 KB Created: 2020-08-13 21:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28b3d73fcfe25e6dcd814b66e467b770 SHA-1: e581ea69bafd172c9b1bc5f80db359b1a518ea48 SHA-256: 3a0eeac0d2b3f5c5de610b651a0f469d322b09f1015caa8fdfb939c744074c10
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=blink+malcolm+gladwell+free+pdf'. This indicates a phishing or social engineering attempt to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL, reinforcing its role as a lure. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic.

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=blink+malcolm+gladwell+free+pdf
    • http://files.perennialchildcare.com/uploads/1/3/2/6/132696210/nidaparumamujajo.pdf
    • http://files.cherryhilllawncare.com/uploads/1/3/0/7/130739011/6abdc35b8.pdf
    • http://files.jessicabarkltheaterartist.com/uploads/1/3/0/7/130775974/menanuvoniked_gorewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/dowuzabeguvil.pdf
    • https://cdn.shopify.com/s/files/1/0432/8584/0036/files/45207338583.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/vejodu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9910/9016/files/67863670721.pdf
    • https://cdn.shopify.com/s/files/1/0433/9341/7383/files/malie_sheet_mask_in_dubai.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/lugefinavemixituzapedeta.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/bubble_sort_pseudocode.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/vokazisaderozite.pdf
    • https://cdn.shopify.com/s/files/1/0434/8303/7860/files/95032708209.pdf
    • https://cdn.shopify.com/s/files/1/0431/9064/8996/files/15740974053.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/3099986337.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/a_history_of_anthropological_theory.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_off0000b0e0.bin
0e3a3a3261b7b8e754f10a9f0e3ba8bc452bc1c91d0ba99ae1b8f2470a89366d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E0 5500 bytes
font_01_sfnt_off0000c385.bin
f949f5d87f96bf3e97eb2891d9a4fad084c5b7bf4c1f0d53082a7be806120b89
pdf-font-stream PDF embedded font (sfnt) at offset 0xC385 10888 bytes