Malicious PDF — malware analysis report

Static analysis result for SHA-256 969796166597a03d…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 18:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e54e03d6683d5777a0ba0a9b4ddaf17 SHA-1: 7fd7f36503803a5b026784832733ba248a4e1246 SHA-256: 969796166597a03d598804ed22825d233110eba8f87287e6a4b3e3531f11a84a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though obfuscated, contains text related to a 'Bams syllabus 2020 pdf', suggesting a lure to disguise the malicious intent. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating a phishing or malware distribution attempt.

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=bams+syllabus+2020+pdf
    • http://files.danielmarkos.com/uploads/1/3/1/8/131871416/relafud_pojukukuja.pdf
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdf
    • http://files.primecleaningsystems.com/uploads/1/3/1/3/131380723/kuzokasof.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7879/files/51204786363.pdf
    • https://cdn.shopify.com/s/files/1/0430/6970/2306/files/39662002219.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/15834794982.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/tuvad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0522/2822/files/96453905252.pdf
    • https://cdn.shopify.com/s/files/1/0432/3003/6123/files/79013619823.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6519/files/82279045913.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/xovokezujeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8164/files/magic_city_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/20260349644.pdf
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/81704109313.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006521.bin
471b83da0cc8c0dc6158b04a9a7b0a2e1c1c68159590703e6539879ddda10a86
pdf-font-stream PDF embedded font (sfnt) at offset 0x6521 5076 bytes
font_01_sfnt_off00007661.bin
ef2da4af00d1e5008f69045bbc6c90376c3cb86a768a6e3169e358cc3418903d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7661 10208 bytes
font_02_sfnt_off00009947.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x9947 4324 bytes