Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0585722b5fd91f9…

MALICIOUS

PDF

60.7 KB Created: 2020-08-18 21:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 243a103b2216f1961b709865b820a2b4 SHA-1: 2ee1b511e7333e8dee5dc95683802e6f33f99f04 SHA-256: b0585722b5fd91f9c1ebc89b2fc3bd053039826539dcb6a66302b5c279b86660
154 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, directing users to 'https://ttraff.cc/pify?keyword=share+chat+friendship+photos+telugu'. Additionally, it exhibits a PDF link farm heuristic, containing numerous external links, many hosted on shopify.com. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same lure text as the malicious URL, suggesting a social engineering attempt to drive traffic to malicious infrastructure.

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=share+chat+friendship+photos+telugu
    • http://perikon.atlasbible.org/uploads/1/3/1/6/131637027/8202258.pdf
    • https://cdn.shopify.com/s/files/1/0440/7122/3446/files/30700297870.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/90198628966.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/rigujasigixus.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/kolabajidotavowid.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/video_lagu_abiem_ngesti_sonia.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/john_deere_190c.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/kemugalifowipinovemoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6262/files/azure_data_factory_v2_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/chaos_core_trove.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8886/files/princeton_review_mcat_subject_review.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/the_collapse_of_the_third_republic.pdf
    • https://cdn.shopify.com/s/files/1/0432/1961/5904/files/power_v_minecraft.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ab1.bin
0312ed44246b3b55ce138417252c58de6de5d3289afd9fb56aba61189ecbcdd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB1 5520 bytes
font_01_sfnt_off00006d62.bin
c571957484068fca439a6f2a4f37c966d99ed8b54d20cfa83146799c9bdb0bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 4988 bytes
font_02_sfnt_off00007edf.bin
937b8de50162b0ae4c67a000c8b6e77eaa66e3f08ee6342c6e5eadcad9526f47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDF 15668 bytes
font_03_sfnt_off0000aa54.bin
dc47311475d10f24d28bd2af555eb66e90664b8ff3c708ed88ad2a85d5376567		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA54 10192 bytes
font_04_sfnt_off0000cd36.bin
f53b43e12006e3d52612f085e6e184fa5bba3604999f0cb64562e6bb996dc06b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 16384 bytes

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