Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efc50c376c10da9…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 12:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 019d4d00c6b8ac754102dc13a88afb73 SHA-1: ea554b0bfa2a7f07250c3add560a7d0e92806953 SHA-256: 7efc50c376c10da9dc018e8bd6ea6ad2a8b37a090ae021f44be0b9492b68989d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=libro+enfermeria+materno+infantil+burroughs+pdf'. This URL is likely used to redirect users to a malicious site for phishing or malware delivery. The document also contains a large number of embedded links, many pointing to Shopify, which is flagged as a PDF link farm. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=libro+enfermeria+materno+infantil+burroughs+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14490041284.pdf
    • https://cdn.shopify.com/s/files/1/0431/6987/4082/files/22812461840.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/nalidegilawaguz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/despise_verb_forms.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/57297643452.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/94763231649.pdf
    • https://cdn.shopify.com/s/files/1/0432/7460/0598/files/47509702828.pdf
    • https://cdn.shopify.com/s/files/1/0430/0714/8185/files/diperisunitiwoxifimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/82658683397.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/cuisinart_belgian_waffle_maker_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/metal_gear_solid_2_theme.pdf
    • https://cdn.shopify.com/s/files/1/0438/9853/6091/files/characteristics_of_an_information_literate_person.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/fotokopobukokiwez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/dragon_ball_z_complete_series_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0440/6208/1174/files/bokoko.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/82456774797.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/5175/9269/files/ramayana_story_book_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/1234/8314/files/cofactor_of_a_3x3_matrix.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_off00005207.bin
e6eab641f47f64d000f6cb6f1ce3a402db4718bc1a4e9a16debcc4b52822981c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5207 5420 bytes
font_01_sfnt_off00006434.bin
325645df6fc59accbea1824802d416d9260f16f37e345595b316ae09f710148a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 14768 bytes
font_02_sfnt_off00009196.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9196 4324 bytes

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